A Seven Days Girl

By: Tsuki no Shijima

Summary: Hiro screams loudly one morning, terrified to see that he has changed into a "girl". Now, he must tries to spend his time as girl until God-knows-when while his older brother and friends are trying to solve this problem.

Inspired from the story of "Girls Just Wanna Have Fun" by SaturnXK.

Disclaimer: I don't own Big Hero 6.

Warning: Beware of typos and bad grammar. English is NOT my main language. I have this bad habit of not realizing my mistakes on my stories until days or even months after publishing the story.

-oOo-

Day 3

It was Saturday morning. Tadashi didn't have any classes on weekend. So, he and Hiro were watching a movie right now. They sat on the couch, with their comfortable positions. Apparently, Hiro still had no sign of turning back into guy soon.

Hiro sighed. She couldn't focus on the movie they were watching. So many thoughts were running in her head. Tadashi noticed this. "Hey, is there something wrong?"

She turned her gaze to look at him, "No. It's just that, I really have things running in my head right now."

"Still worried about 'that'?"

Hiro nodded. Tadashi raised his hand and ruffled her hair, "Hiro, don't worry about that. I've told you, that I and the others will find the way to solve this problem and change you back. I know it's hard for you, but please, be patient for a while, okay?"

"I know. But if I don't change back, you'll still be my brother, right?"

He smiled, "Of course! Nothing will ever change that. And I will stick with you until you grow old and grey!"

She snorted at him, "Oh, man. I have to live with one hell of a brother complex like you till I'm old!" Tadashi pouted at her, "Hey, it's called being a protective older brother, you know!"

"Yeah, yeah, I know," she said nonchalantly. Then, a smile appeared on her face. "Thanks, nii-chan."

"You're welcome, Hiro," he said with a smile as he wrapped his arm around her shoulder.

"Boys, I'm home!" Aunt Cass suddenly appeared right behind them. They were shocked and looked back at her. "Did you two miss me? I hope you didn't go into troubles like-" she stopped when she saw her oldest nephew, wrapping his arm, around a mysterious girl. Right in front of her.

Aunt Cass sighed, "Tadashi, I just went to grandma's house for a few days and you already dare to bring home your girlfriend when I wasn't around?"

Tadashi was surprised at her accusation and tried to defend himself, "What?! No, aunt Cass! This is-" Aunt Cass cut him, "Tadashi, don't try to hide it now. I already saw it with my own eyes. I've told you that you can have any girl you want as a girlfriend. But, she looks really young."

"Aunt Cass, listen-"

"She looks like she is around Hiro's age."

"Yeah, she is fourteen. But-"

Aunt Cass didn't even let him finish his words, "Tadashi, I have raised you and Hiro for eleven years. But I didn't raise you to be a lolicon!"

His jaw dropped. He then realized at what she said, "What?! Aunt Cass, I'm not a lolicon! And she is NOT my girlfriend!"

She raised her eyebrow in confusion, "Really? Then who is she?"

Before he could answer, Hiro answered her first, "Aunt Cass," she looked at her. Aunt Cass just stared at her. "It's me, Hiro," Hiro said, slowly. She was worried with what her reaction would be.

Silence filled the living room. The siblings were staring at their aunt with anxiety. Aunt Cass was just stood still, no words coming out from her. Their anxiety grew more. But, after a few minutes of silence, aunt Cass fainted.

-oOo-

After aunt Cass got her consciousness back, the three of them were now sitting on the dining chairs. They felt uneasy with the unreadable look on their aunt's face. "So," she started, "Are you a cross-dressing fetish now, Hiro?"

"Aunt Cass, I'm not a cross-dressing fetish!" Hiro said, couldn't believe at her accusation.

She narrowed her eyes, "Hiro, I don't mind if you like to cross-dress. It's not like I will prohibit you for that." She sighed, "I just can't believe that you like to cross-dress behind my back. I really want to dress you up with cute clothes, too, you know."

Tadashi's jaw opened, while Hiro stared at her incredulously. "Aunt Cass, Hiro isn't cross-dressing right now. In fact, he somehow changed into a girl in one night. And we're still trying to figure out on how to change him back," Tadashi explained to her.

"So, it's real?"

"Yes," Tadashi answered.

She suddenly stood up and touched Hiro's breast, and squeezing it. Hiro jumped back and crossed her arms in front of her breasts, "Aunt Cass! Why the heck did you do that!?" She was blushing so hard. And Tadashi's face also reddened after seeing what his aunt did to his bro-, *cough* sister.

"So they are real. And bigger than mine, too, when I was about your age. I guess you got that gene from your father's side, huh?" she sighed, and somehow she looked sad and envious at the same time.

"Please, just don't do that again. It's really embarrassing, and uncomfortable, you know!"

"Alright. Anyway, I'm glad that my oldest nephew is not a lolicon," she sighed again, in relief.

Tadashi groaned, "Aunt Cass!" She and Hiro chuckled at him. That, was until Hiro felt something weird. "Uh, I think I need to go to the bathroom," she said as she stood up from her chair. "Another need to pee?" Tadashi asked. "You know how to pee, right?" Aunt Cass added.

"No. And yes, aunt Cass. Just, don't say that thing again!" Hiro suddenly remembered her embarrassing moment about that. She quickly walked to the bathroom. They just at there while they waited for Hiro to come back. Until they heard a bloody scream from the bathroom. They hurriedly went to the bathroom door.

"Hiro, are you okay?!" aunt Cass asked in panic.

"Hiro, what happened?!" Tadashi asked in panic, too.

Hiro opened the door, and fell down to her knees. There were tears and fear written on her face. She mumbled something, but the two couldn't hear it. "Hiro honey, please say it louder. We can't hear you," aunt Cass said.

"Tadashi, aunt Cass! I'm dying!" Hiro screamed in fear. They were confused. "Blood! There is blood on my underwear! Oh my God! Am I dying?! Am I going to die soon?! Please tell me!" Hiro's body was trembling in fear. Tadashi and aunt Cass were trying to figure out what she meant. Until a realization came to aunt Cass.

"O-oh, that! Hiro, you're not dying," she said.

"I, I'm not?" she asked, still in fear.

Aunt Cass nodded, "Mhm! It means you're having your period now."

"Period? Isn't that just for girls?" Tadashi asked in confusion. Aunt Cass gave him an incredulous look, "And what is Hiro right now?" Tadashi face-palmed and groaned, "Uh, not again!"

She just shook her head, "I will go to my room and see if I still have a spare sanitary pad for her. Tadashi, go upstairs and bring down a clean underwear for Hiro. And Hiro, just stay here until we get back, okay?"

Hiro nodded, as the two went separated way to get the things she needed.

-oOo-

Four hours later, around 4 pm..

"Uugh, Dashi, it really hurts," Hiro said while clutching her hands on her abdomen. She groaned, feeling the pain of having a period for the first time. Tadashi looked at her in worry. "Want me to get you a bottle of warm water? Aunt Cass said it will help you to reduce the pain if you compress it to your abdomen."

She nodded, "Sure. Just, don't take too long."

"Okay."

Tadashi went down. After five minutes, he came back with a bottle of warm water in his hand. He gave it to Hiro. She took the bottle and compressed it to her abdomen. Tadashi just sat on Hiro's bed, watching her, hoping it really helped her reduce the pain.

"Has she come back from grocery shopping? I think I need to change the pad now. It's getting uncomfortable."

"I think she will come back soo-" He was cut when he heard aunt Cass's voice, "I'm home!" Tadashi stood up, "I will ask her for a new pad."

He went downstairs and met aunt Cass in the kitchen. "Hey, aunt Cass."

"Oh, hey, Tadashi. How is Hiro?" she asked. "Well, she is compressing her abdomen with a bottle of warm water, just like what you suggested earlier. But she said she needs a new pad now," he explained to her. Aunt Cass suddenly groaned at this, realizing something, "Uh, I really forgot about that."

Tadashi raised his eyebrow. "You see, the one I gave her was actually the last one I had. I planned on buying a new stock but I forgot about that. How about you go to the market and buy a new stock for her?"

"What? Why me?!"

"Tadashi, I just came back from there. And I need to prepare the dinner. Come on, Tadashi. You don't want to see her uncomfortable right? Besides, it will be bad if we keep her with that full of blood pad."

He groaned. He really didn't want to go and buy those pads. It would be really embarrassing for a guy like him to buy sanitary pads. But he couldn't possibly let his baby sister feeling uncomfortable with the dirty pad. Moreover, she was in pain now and he was worried about what would happen to her if she didn't change the pad as soon as possible. He sighed in defeat.

"Okay, then. I'll go now. I can't let her feel more uncomfortable than she does now." With that, he took his moped key and helmet. Then he went to the market. 'It's just buying sanitary pads for Hiro. It wouldn't get any worse than that, right?' he thought as he was on the way to the market.

-oOo-

Okay. So, Tadashi was really wrong. It got worse as soon as he reached the sanitary kits aisle. His face went paled. He felt like he was having a nightmare right now.

Right in front of him, there were so many sanitary pads with different kinds and from different brands. He didn't know what to choose. Heck, he didn't even know what the differences were. He groaned. He felt stupid because he didn't even ask what kind of pads he needed to buy for Hiro.

Tadashi took out his phone and dialed Hiro's number. After a few rings, she picked up.

"Hello?"

"Hey, Hiro."

"Why are you calling me by phone? Aren't you with aunt Cass downstairs right now?"

"No. I'm at the market right now. Aunt Cass said the pad she gave to you was the last one she had and she forgot to buy you new ones."

"I see."

"So, what kind of pads do you need?"

"How should I know? I'm wearing the one she gave to me. And really, it's not comfortable. I feel like there is a bump on my underwear."

"A bump?"

"Yeah. Just ask aunt Cass. And buy me the ones that won't make me feel like there is a bump on my underwear again. See you soon."

She hung up at him. He thought for a while now. Hiro was right. He should have asked aunt Cass, not her. She was the one who gave her the pad after all. So, he dialed up aunt Cass's number.

"Hello, Tadashi?"

"Hey, aunt Cass. I want to ask you something. What kind of pads should buy for Hiro? There are so many of them here."

"Have you asked Hiro?"

"Yeah. But she said that I should ask you, not her. And she said she wasn't comfortable with the one she is wearing now. She said it feels like there is a bump on her underwear."

"Hmm, I see. Well, just buy the ultra slim pads. And considering that it's her first period, I guess it will be better if you get her the night pads. I think the ones with 29 centimeters long is enough. Oh, buy the ones with wings so it won't wrinkle when she moves around. I will hang up now. I don't want the foods to get burnt. Bye."

She hung up. Tadashi felt more confused right now. 'Ultra slim pads? Night pads? 29 centimeters long? And with wings?! Why does a pad need wings on it?!"

He groaned. He stared at those sanitary pads in front of him. His face grimaced. He felt like as if those sanitary pads were mocking and laughing at him right now. He ran a hand down on his face. He sighed as bit his lower lip as he thought about something.

'Maybe even the universe is laughing at me now.'

-oOo-

Aunt Cass was laughing at Tadashi, who was having his head on the dining table. The three of them were having dinner. Hiro was munching her food as she listened to what her brother went through two hours ago in the market. She felt pity toward him, but she needed the clean pads too, anyway.

"Come one, Tadashi. It's not that bad. Besides, it was a good experience for your future after you marry someone. I'm sure you need an experience like this when you buy another sanitary pads for your wife. Or even your daughter," aunt Cass said, trying her best not to laugh again.

"But that won't happen anytime soon, aunt Cass," he frowned at her.

"Dashi, was it really that bad?" Hiro asked.

"Of course it was. Some girls and the cashier were laughing at me! Maybe even the universe was laughing at me!" he said in frustration.

"Well, at least you got me the right and comfortable pads in your first time," Hiro said as she shrugged her shoulders and continued eating her food.

"Good. Because I don't want to go back there and buy you another one again! Ugh, what a horrible day today."

Aunt Cass laughed at him again, "You're too exaggerating, Tadashi." He frowned at her again. After aunt Cass's laughter died down, Tadashi sighed in exhaustion.

"Hey, aunt Cass?"

"Hm?"

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"Please, don't make me go buy those hideous sanitary pads ever again!"

-oOo-

Author's Note: Oh, come one, Tadashi! They are not hideous like what you think, lol. Maybe I can make you wear one soon? Lol. *Gets a glare from Tadashi* *Gulped hard* Ah, anyway, I have always wanted to make a story where a guy must go to a market and buy a pack of sanitary pads whether it's for his mom, siblings, or even girlfriend. I heard it's an embarrassing thing guys always try to avoid. And I remembered on how my boyfriend actually proved it to me, lol xD.

Also, thank you for Anonymous7 and YaoiFlavouredMacaron for the birthday greetings! It made me really happy, remembering on how few the people who remembered my birthday in real life. Well, as much as it was a sad thing to me, I was really happy to see the Big Hero 6 tv series opening at midnight right on my birthday! Thank you Disney! Best birthday ever! And I hope we can see the sequel movie soon. I really miss seeing Tadashi and how I wish Hiro and Tadashi will reunite again.

Anyway, what do you think about this chapter? Don't forget to leave a review! Until next time~