Title: UnderMind: An Undertale AU

Disclaimers: I do not own Undertale, but I DO own UnderMind. Please do not use my AU version of the characters without my permission. BratTale is set in a WorldView setting like MommaCQ, so, I want to give credit to AlainaPrana, who owns MommaCQ.

Sugar and Sour are Co-owned by AlainaPrana and Alannahablar

Original Asy and Furg/Star belong to Furgemancs

Original Ink belongs to Myebi/Comyet

Notes: I started this AU idea being influenced by Big Brothers Big Sisters of America. They match kids with young adult mentors. Four times a month, they hang out together doing anything from studying to playing sports. This program lowered the possible drug use and possible chance of jail time for a lot of kids, allowing them to have a better future! I wholeheartedly support them! Also, Undyne's fraterity is in no way a nod to monster university. just a coincidence. Also, as requested by Sugar's owner, he will not be making any appearances. You may have noticed the cover image for this story has changed. The picture shows what Alyssa and Cooler look like. Note that Alyssa is Six foot tall and Cooler is seven. I have been told that the title, BratTale is cringy. So, I changed it to UnderMind.

Song Choice: A Thousand Years by Christina Perri (I know, total cliche wedding song. Get over it)

Summary: It's the big day. Tensions are high, resolves are wavering, but Alyssa and Cooler are both ready for this. The only way, in Alyssa's view, the day could be a bit more perfect. When a disoriented visitor drops in on Alyssa, he offers to give her what she wants, but only for a short time.

"Regular Talk"

'Thoughts'

phone calls, texts, or sign language

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

Cooler's POV

I walk into the kitchen to be greeted by three men with bad hangovers. "Must you walk so loud, Santious?" Father asks holding his head. "You knew what would happen when you got drunk, Father. I will not baby you, Asgore, or Asriel." I say getting some breakfast started. "We didn't do anything too bad, did we?" Asriel asks. "Asriel, you were easy to look after compared to our Fathers." I say making Asgore and Father look at each other. "We weren't that bad, surely" Asgore says and I point to the video tape. "Video proof. Watch if you don't mind hurting whatever pride you have left." I say and put plates of bacon, egg, and hashbrowns before them.

"I will have to say that it was good practice for when I have my own kid." I say making Father groan. "It will be alright, Gaster. It happens to the best of us." Asgore says patting his back. "I know...I'm just not ready for all of this...not ready to be a grandfather." He says picking at his eggs. I shake my head as I sit down. "We already talked about kids. Alyssa and I are not ready for that yet. Alyssa's career just took off and I'm still in college. Having a kid wouldn't be the best thing for us right now" I say and they nod. "Speaking of kids, where's Papyrus?" Father asks. "You know how he is. He's already dressed and ready to go. He went to check on the garden again." I say and he nods.

Alyssa's POV

I'm making breakfast when Chara, Toriel, and Frisk come into the kitchen, dragging their feet. "Good morning, sleepyheads" I say maybe a bit loud. They flinch as they sit at the table. "Please, my child, not so loud" Toriel asks holding her head. "No way. You three put me through the wringler last night. Oh, Chara, you knocked over your china cabinet." I say and she looks horrified. "It's all on tape if you want to watch it. Needless to say, I now know why frisk is named frisk" I say with a shiver. They blink at me. "Oh god..." Frisk says horrified. "Alyssa, I'm so sorry..." She says. "It's fine. You were the worst of it. Toriel started acting like a child, and Chara...I think they call them professional drinkers." I say and they nod as I put breakfast on the table.

"From what Cooler texted me, he had it much worse than I did. We agreed to swap tapes." I say and they grin. There's a knock at the door. I go to find that it's Papyrus. "I got that tape for you, Alyssa. Sans won't let me watch it." He says handing me the tape. "Probably for the best, Paps" I say handing over my tape. "Well, I will see you at the wedding then" Papyrus says and leaves. I come back with the tape and smile. "Shall we?" I say and they nod. I put the tape in and sit down for my own breakfast. Needless to say, the video cheered us all up. "Poor Sans. Toriel, your husband really needs to keep his fire in check." Chara says. "At least my husband can hold his liquor." Toriel retorts. "Hey, my husband just so happens to be your son. So, how does that make you feel?" Chara says. I shake my head and go to the guest room.

Cooler's POV

We watched the tape that Alyssa sent over. It was dissappointing to see the ladies were much more behaved than we were. I sigh and go to get ready. Closing the door behind me, I think about what I am about to do. I don't deserve Alyssa. I really don't, but she loves me anyway. I smile a little and take a shower. I know that we said no kids for now, but I really do want to be a dad. I'm pretty sure I would be good at it. I rinse off and step out of the shower, drying off. Part of me wonders what form Alyssa will walk down the aisle in. She's gotten a lot more comfortable with her skeleton form, but her masic form is beautiful as well. I start to get dressed, my hands shaking. 'Probably just my nerves' I think.

There's a knock on the door. "It's open" I say and Father comes in. He's already dressed in his Tuxedo and smiles at me. "Nervous?" He asks noticing my hands and I nod. "It's perfectly normal to be nervous. I know I was." He says helping me with my tie. "Father...how did you know Mother was the one?" I ask. He rubs his head. "Well, it wasn't like it was for you and Alyssa, son. Your Mother and I were an arranged marriage. So, we didn't really like each other at first." Father says. "Oh..." I say realizing how lucky Alyssa and I had it. "But that is how it is with powerful families. After about a year, we finally felt comfortable enough to share a bed...we tried so many times after that..." He says sadly.

"Father?" I say putting my hand on his shoulder. He sighs. "I'm alright. Just remembering all the troubles your Mother and I faced. Seeing you now, I know your Mother would be proud of the man you have become...I know that I am" Father says hugging me. I try not to cry as I hug him. "I wish she was here, Father" I say and he rubs my back. "As do I, my son, As do I." He says and lets me go. There's a knock on the door. "It's open" I say and Chara comes in wearing her braidsmaid dress, which is a light lavender color. I blush a little. "Umm hey Chara" I say. "I'm just here to check your tie. It has to be straight." Chara says and fixes my tie. "Oh, and to give you a message. You ever hurt Alyssa, in any way, and I will scatter your bones so no one will be able to put you back together." She says, Her face scary like when she's scorning Asriel. "Understood" I say with a gulp. Her face then has a big smile on it. "Glad we could have this chat. See you boys in a couple hours!" Chara says and leaves. "Chara...is frightening" Father says and I nod.

Alyssa's POV

I'm excited, really I am, but...I'm a little depressed as well. I always thought my Dad would get to see this day...be able to walk me down the aisle. I'm already in my gown. It's beautiful. Mainly purple with a pale purple veil to match. However, the back made me feel a bit exposed and my neck was getting cold. It always got cold easily. I grab the scarf that my Dad got me so long ago and wrap it around my neck so the rest of it covers my back. I look at the time. An hour to go...an hour... I really don't want to start crying, but isn't that supposed to be a good thing for a bride on her wedding day? A loud crash behind me makes me jump.

"That was not my best entrance." A voice says as a skeleton brushes himself off. "Are you alright? You didn't break anything did you, my friend?" He says helping another skeleton up from the floor. My eyes widen as they and my hair goes a bright shocked blue. "I'm alright, but care to tell me where we are and why you dragged me here? I have to get back before Alyssa wakes up." My Dad says glaring at the other skeleton. "You'll be back before she does, trust me, Asy." The other skeleton says. "Ink...where the hell are...we..." My dad trails off seeing me. The other skeleton, Ink grins. "You and Alyssa are my friends. Alyssa helped me big time when she was really young. She doesn't remember, but I owe her my life. Just wanted to make her big day perfect to pay her back." Ink says.

"Big day?" Dad says and looks me over. His eyesockets widen in realization. I come over to him slowly, afraid that he was just wishful thinking making me see things. "Daddy..." I say and he hugs me tight. "I'm here, Sweetie. I'm here." He says and I start crying. "I...I miss you so much, Daddy..." I say. "Whatever happened, I'm sorry, Sweetie. I'm here now" He says holding me. "Well...that's until after the reception" Ink says and we look at him. "That's as long as I can allow before this AU will try to get rid of Asy because he's not where he belongs" Ink explains and we nod. "But...I don't have a Tuxedo..." Dad says. Ink grins and pulls his huge brush out of nowhere. 'must have pulled it from wherever he comes from' I think as Ink proceeds to paint a Tuxedo on my Dad.

"That should do it!" Ink says. I smile a little. "Looking great dad" I say and he smiles. "Not as great as you, Sweetie. I can't believe you still have that old scarf" He says and I smile. "Why wouldn't I? My Daddy got it for me" I say and he smiles. "I will return later to collect Asy. Enjoy the time while you have it" Ink says and leaves through a portal. I smile at my Dad as he sits on the bed. "So, who's the lucky guy?" He asks. "Do you remember the boy I shared my funnelcake with?" I ask and he nods. "It's him. His real name is Santious Gaster." I say smiling as I sit beside him. "So, little Sans gets his memory back?" He asks. "Mostly, but there's still things he doesn't remember." I say.

There's a knock at the door. "Alyssa, it's time" Toriel says from the other side. I smile, putting my shoes and veil on. "You became so beautiful, Sweetie." Dad says and makes sure the veil is straight. Toriel opens the door. "Alyssa, who are you...Oh my stars, Asy!" Toriel says hugging him. "H-hey Tori. You look well." He says. "How..." She says letting Dad go. "He's from the past, Tori. Ink...Ink brought him just for today. He has to go back after the reception. Something about preventing time and space from hunting my Dad down." I say and she nods. "This must all be so confusing for you then, Asy." Tori says and my Dad nods.

"It will be alright. I'm sure that in time, it will make sense" My dad says and she nods, leading us out. It didn't take long for the news that the past Asy was going to be at the wedding and reception. The most...interesting reaction came from Furg though. Tearing up, she actually kissed him! "You idiot..." She says crying. "Furg...why..." Dad says surprised. "Isn't it obvious? I always loved you...I regretted not telling you though." She says and goes to her seat in the garden. I giggle as he blushes. "Well, let's not keep everyone waiting, huh?" Dad says and I nod. The wedding march soon starts as Little Azzy, Toriel's youngest daughter at five, goes down the aisle spreading pink rose petals. Undyne, Toriel, and Chara follow her, taking their places beside where I am to stand.

I take a deep breath and let it out, allowing my hair and eyes to go bright pink. Dad smiles at me and we walk down the aisle. I barely notice a flash. 'I am so getting a copy of that picture' I think as my eyes lock with Cooler's. He's wearing a tuxedo with his usual blue color scheme, and looks just as nervous as I am. I smile as Dad hands me over to him. "Take good care of my baby girl, Santious. I can't come back to kick your ass" Dad says and takes his place beside Asreil. Asgore, who is presiding over the wedding, shakes his head. "Not a happy marriage if the groom doesn't get threatened by the father of the bride." He says, making me giggle as Cooler nods. Asgore lifts his hand and clears his throat and the music stops. "We gather here to unite these two souls in marriage. Their decision to marry has not been entered lightly, and today, they publicly declare their private devotion to each other." Asgore says as I stare into Cooler's eyes.

Cooler's POV

I stare back into Alyssa's eyes, and I know that I am doing the right thing. Nothing, I mean nothing felt more right. "The essence of this commitment is the acceptance of each other in entirety, as lover, companion, and friend. A good and balanced relationship is one in which neither person is overpowered nor absorbed by the other, one in whichneither person is possessive of the other, one in which both give their love freely and without jealosy." Asgore says. 'Am I a bit possessive?...only when someone hurts Alyssa.' I think as I smile softly at her.

Alyssa's POV

I smile listening to Asgore, but inside, I worry. 'Am I overpowering?...I know I would never hurt Santious, but what if I do?...He would forgive me...I know that he would' I think as I look back at cooler. "Marriage, ideally, is a sharing of responsiblities, hopes, and dreams. It takes a special effort to grow together, survive hard times, and be loving and unselfish." Asgore says. 'No matter what happens, I will stand by Santious, no matter where this road leads.' I think to myself.

Cooler's POV

'I will try my best to remain as unselfish as Alyssa is. I will hold up her hopes and dreams...' I think to myself. "Do you both pledge to share your lives openly with one another, and to speak the truth in love? Do you promise to honor and tenderly care for one another, cherish, and encourage each other, stand together, through sorrows and joys, hardships and triumphs for all the days of your lives?" Neither of us hesitate as we say we do. 'How can I not pledge that? I'll never stop trying to be the man Alyssa needs me to be.' I think.

Alyssa's POV

'Why would I not pledge that? I love Santious with everything I am. I would never abandon him' I think as I answer. "Do you pledge to share your love and the joys of your marriage with all those around you, so they may learn from your love and be encouraged to grow in their own lives?" Asgore asks. "We Do" Santious and I both answer. Monster kid comes over with a pillow on his head. On the pillow is the rings, simple gold, a little tarnished from age. They once belonged to Gaster and his wife, Emily. Cooler and I both agreed to use them. Both to honor Santious's parents, and to hopefully be as fortunate as they were in love.

Cooler's POV

Asgore takes the rings from Monster kid, and I start to feel nervous. A gentle squeeze on my hands reminds me that I'm not alone in this. I smile at Alyssa. "May these rings be blessed as a symbol of your union. As often as either of you look upon these rings, may you not only be reminded of this moment, but also of the vows you have made and the strength of your commitment to each other. The Bride and Groom have decided to write their own vows." Asgore says stepping back a little to give us room. I look into Alyssa's eyes and smile softly.

"Alyssa, to you I vow, to be honest, loyal, and kind. I vow to support your hopes and dreams. I vow to never stop loving you, no matter the hardships we face in life, and in ourselves. I vow to try to be the man you deserve, and the father I may eventually be that our children will deserve...with this ring, I vow all of this, and what only my soul can say." I say putting the ring on Alyssa's finger.

Alyssa's POV

I try not to cry as Santious puts the ring on my finger. "Santious, to you I vow, to be honest, loyal, and kind. I vow to be your light in the darkness, to be your shelter from the cold nights. I vow to never stop loving you, no matter the hardships we face in life, and in ourselves. I vow to try to be the woman you deserve and the Mother I may eventually be that our children will deserve...with this ring, I vow all of this, and what only my soul can say" I say putting the ring on Santious's finger.

"Go now in peace and live in love, sharing the most precious gifts you have- the gifts of your lives united. And may your days be long on this earth. I now pronounce you husband and wife. You may kiss the bride" Asgore says and Cooler kisses me passionately in front of everyone. Time seemed to stop at that moment and it left me breathless. I smile as we break the kiss and Undyne hands me back the roses. Cooler and I run down the aisle as everyone throws rice over our heads. Before exiting the garden, I toss the roses and they are caught by Alphys, who blushes like crazy. I giggle as we get in the car nearby to be taken to where the reception is being held.

Cooler's POV

I smile at Alyssa as we are driven to the reception. "So, how does it feel to be Mrs. Gaster?" I ask and she smiles. "It feels like a dream, and I don't want to wake up." Alyssa says, leaning against me. I wrap an arm around her shoulders. "I feel the same, love. This day can't get any more perfect." I say. She nods with a small smile. "I was surprised that Ink did what he did...bringing my dad from the past, but I'm glad he did" Alyssa says. "Why did he do it?" I ask curious. Alyssa rubs her head. "He said something about repaying me for the kindness I showed him by saving his life. I don't remember that though, but he said that I probably wouldn't." She says and I nod.

"Today was crazy..." Alyssa says. "You mean the whole past week." I say and she nods. "Besides, today isn't over yet. We still have the reception to get through." I say and she nods. "And embarrassing toasts." Alyssa says and I nod. "God, I'm glad that you got Undyne as your maid of honor now. She really knows how to dish out the embarrassment." I say and Alyssa giggles. "But Asriel raised you for a good chunk of your life." Alyssa points out. "Sleet, I am so doomed" I say as she laughs. We soon arrive at the resturant. We decided on the same small resturant that I asked Alyssa to be my girlfriend at. Alex smiles seeing us getting out of the car. "There's the happy couple. I'm guessing that everyone else is on their way?" He asks and we nod. "There's one more than we expected, Alex." Alyssa says and he nods. "Good thing we put down a couple extra for the seating and meal then. So, who crashed the wedding?" He asks as we go inside.

"...My Dad." Alyssa says making Alex look at us. "Ink brought Asy from the past, but only until after the reception" I explain and he nods. "Talk about a wedding gift. I don't think anyone will be able to top that" Alex says and we take our seats as everyone else comes in. I wave at Asy and Alex makes a space for him beside Alyssa. He gives me a smile as he sits next to Alyssa. "The vows were beautiful, you two." He says making Alyssa blush. Soon enough, the resturant is packed. As drinks and food is served, the toasts begin. Fortunatly, none of them were too embarrassing...well, until we got to Asriel.

Asriel stands up, raising his glass. "I have a very...unusal relationship with the groom. For a chunk of his life, I was a father, a friend. I may not know how he was before he was brought to Chara and I, but Sans used to be quite the troublemaker." Asriel says making me groan. I feel Gaster's gaze on me and I shrug at my father. "There is one inccident that still makes me laugh to this day." Asriel says and I groan again. 'Not this one' I think. However, Asriel showed no mercy. "Most of you probably wonder why Santious doesn't ever teleport. Well, it's a funny story. Santious was about thirteen at the time. We had been playing soccer in the park and decided to take a break. Well, we were drinking some water. I had told him not to drink it so fast, or he'd get hiccups. Being the smartass kid he was, he asked how a skeleton could even get the hiccups. They didn't have the guts" Asriel says and everyone laughs a bit.

"Well, as you can believe, he didn't listen and got the hiccups. What happened next I didn't expect. He started teleporting all over the park in time to the hiccups." Asriel says as everyone, including Alyssa laughed. I chuckle a little. It was a funny story, to be honest. I just didn't like some of the places I ended up...especially LustTale. I still have nightmares of Toriel like that. "Then, he vanished all together. I spent all day looking for him. By the end of the day I was worried. Just how far did the kid teleport? I was about to call the cops when I find him standing on my porch looking scared. I never saw him that shaken up before. Then, there was the state of his clothes. Instead of what he had been wearing, he was wearing scrubs from some kind of hospital. To this day, he won't tell me where he had teleported to, and he never teleported again" Asriel says.

Everyone looks at me. "No, I am not going to talk about it." I say. "And neither am I" Asy says surprising everyone. Alyssa looks at me worried. "I'll tell you some other time, love" I say and she nods. "Well, the point is that Santious became the model son after that. He's come a long way from where he's started since he started living with Chara and I. We are so proud to see him happy with his birth family and the love of his life" Asriel says and finishes the toast, sitting down. The rest of the reception was fun, but I could tell that Alyssa was dreading the end.

Song Choice: Supermarket Flowers by Ed Sheeran

Alyssa's POV

Dad leads me out to the dance floor for our father-daughter dance, and I can't help but cry. I could already see Ink behind the crowd, watching us...waiting for the song to end. "Hey, you shouldn't be crying. Today's a happy day" Dad says and whipes a tear away from my eye. "I...just miss you so much...and you have to go back." I say and he nods. "If I don't who will be your dad in the past? Besides, I will always be a part of you, Alyssa. You are not alone, remember?" He asks and I nod with a small smile. "A soul that is broke is a soul that has been loved." He says as the song ends and hugs me tight. Ink and Cooler both come over. "I'm sorry, but it's time, Asy" Ink says and he nods giving me one last hug. "I am very proud of how you've grown, Alyssa. I have to make sure you get to this point, or it will be wasted." Dad says and leaves through the portal with Ink. He waves at me as the portal closes behind him.

Song Choice: Halo by Beyonce

Cooler smiles a little offering his hand. I smile feeling much better then I thought I would when dad went back to the past. I take Cooler's hand and he pulls me in close to him. Another flash of light signaling another photo that I'll want. We dance through the night before managing to slip away from the reception. "Thanks, Alex." Cooler says as he lets us out the back. He chuckles. "Have fun you two. The Capital is beautiful this time of year" He says as we get in the car. It was all part of the plan to vanish from the reception when it devolved into drinking. Neither Cooler or I wanted to take part in getting drunk. So...let's just say I lost my virtue at fifteen hundred feet on the Gaster family's private jet.

To be continued

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

Notes: I really didn't want to write this. I wasn't ready for my babies to get married, but I'm better now. Please REVIEW