It was a calm day like every other day in the peaceful Japan. Birds were chirping, a hot breeze in the air was blowing, ever since Ron left town after Barkin assigned him on a exchange trip in Japan, at first he thought it's was a regular school but he found out it was a secret ninja training school because he have powers and his Sensei want him to train his powers, he been in Japan for two months, Ron missing his friends, Kim and Monique, even his girlfriend Kim.

Him and Kim been dating for a year who she told him, she like him more than a friend, Kim was sad hearing Ron leave.

"I'm going to miss you Ron." Kim hug Ron wearing her green crop top.

"Me too KP, I been gone for two months, no big." He hug her back.

"Stoppable let's go to the airport." Barkin yell out.

"Just a minute Mr. B!" He said giving Kim a passionate kiss.

"Monique, they look cute together." Hope whispered at Monique.

"They do Hope. Ron's good to my girl!" Monique smile watching the pair kiss.

/

In the penthouse suite of the Japan hotel. Yori wouldn't have minded if they'd gotten a nicer room that wasn't old when she shared a room with Ron. Yori just lay on the bed naked and she stared up at the room's ceiling with stained glass chandelier, her ears listen to Ron-San talking.

The ninja girl should have known better having sex with Ron, the blonde was still dating Kim back in his hometown, at the time, Ron save her from Monkey fist and they have been friends fast since Ron coming to Japan, Yori form crush on him, he'd never noticed until she told him and reward him from saying Fist. Yori messing with another girl man. Ron going out with Kim, she had told him she's has it bad for him by her recalled from her memory.

/

Flashback;

Yori takes a deep breath before walking up to her crush and taps his shoulder to get his attention in the training area. "Hey Ron-San, can I talk to you in private?"

Ron looks over his shoulder to see Yori, his new friend he meets in Japan. He was dating Kim as he got done talking to her on the phone. Yori was wearing a shorts sleeve blue shirt, along with a black skirt and black sneakers.

"Um sure, Yori." Ron answers. The two walk in a school room.

Yori will finally confess her feelings to Ron even if Ron we're still in a relationship with Kim.

"So what do you want to talk about Yori?"

"Ron-San I have feelings for you. I can't take it, I know you're dating Kim-San but I like you more than a friend. I'd want to thank you for saving me from Monkey fist."

At this point she could care less about Kim-San being in a relationship with Ron, the ninja wants the blonde boy, she can reward him from bonding fun time on the side, having sex on the low.

"Um Yori look I'm flattered you dig the Ron-man. I'm in a relationship with KP. However, I think we should just stay friends." Ron blushes.

"Maybe I don't want to be your friend Ron-San. Stop thinking of Kim-San, she far away from you." Yori whispered running her hands on his stomach.

"I can't Yori, I'll be back in my home town soon too see my KP." His voice was low.

Ron placed his hands on Yori on hips. He look her in the eye and didn't say anything. "It's been months Stoppable-san since you haven't had pleasure since coming here," Yori replies.

"Yes I know Yori, I can't to that to KP." He let out, "You are very pretty but I can't do that to my gf, let's just stay friends Yori!"

"Be with me for tonight, I'd know you want sex. Kim-San couldn't give you on your long distance trip for months." She grin taking off her blue shirt which move on the floor, revealing her nude body to him, "besides you says I'm prettier than her Ron-San, have bonding pleasure by a sexy ninja by me making you feel pleasure on your stay here." She smirk.

"Yori, I-" He was cut off when Yori wrap her arms around his neck and leaned in to the kiss, eventually her hands started to wander down to his pants, untying it and dropped it to the classroom floor, she push him on the desk.

Yori began touches his chest, she rub of his private area against her. She wants sex.

"Yori," Ron softly moaned.

"Shhhhhh," Yori hush him with a finger on his lips. "I want sex, Ron-San, and I know you do to, just enjoy me being on top of you!" The beautiful Japanese pushed up slightly and settled all the way down, making a groan, she lay down onto him, letting her hips move slowly. It wasn't long until her American crush began moving his hips up at the same time.

The sex making being.

Yori pick up and kissing his body when the raven-haired beauty moan. "Ron-san." Her arms went around his neck, drawing him even closer. In turn, Ron hands came up to her nude back to draw her closer to him.

Yori moan and Ron hands to her back, it was beautiful sex.

The feel of her naked skin on his was solf, as he saw her pushed her hips all the way down, and moaned her name. "YORI WE CANT." His groan.

Yori body gently melt with a gasped and moan his name in turn. "RON-SAN JUST ENJOY IT."


Flashback End;

Out of her memory of how she's gotten together with Ron, remember her words, 'have bonding pleasure with me.'

Yori let herself get drawn in by seeing Ron in secret more and more without her Sensei knowing and the school on what she had done, she slept with Ron who's still in a relationship. Too her she wanted Ron-San, things had gone too far by sleeping with Ron-San when he's in a relationship.

"KP I'll be home soon." The blonde said. "Why are you asking why soon? KP my teacher wants me here more to learn school work." Yori sitting up and brought her white sheet around her breast when the ninja caught a sight of Ron-San just staring up at her wearing nothing.

Yori smirked and lean over her secret bf. "KP just hang on one second." Ron felt Yori leaned down to give him a deep kiss. Yori mouth opened with her tongue to lick every corner of Ron lips.

"Ronnie, are you still online? I want you home because I miss you, Monique and Tara miss you, the cheerleaders, also Bonnie which is weird even Barkin.'

The ninja girl let out a growl of annoyance when she pressed one more kiss on Ron's lips seeing her bf picking up the phone on the bed.

"Yeah, KP I am here?"

Ron blush looking at a nude Yori, curling up on his side, her white sheets dropping down her body and show her large breast that bounce slightly and her nipples were bright pink, her ass cheeks was showing and her butt look like one of those dancing girl in one of Mc Honey rap music video.

Big and oiled up, covered in oils.

Ron could feel a hand came running through his messy hair with Yori breast hit his shoulders.

He was cheating on Kim his best friend-girlfriend with Yori, having a sexual affair, and he should've gets into a hidden affair until Yori give him sex where Kim couldn't since his far away from her, and if Kim found out about him sleeping with Yori, he's dead... so he didn't tell her.

'Man, what have I gotten myself into? KP is going to kill me, I am SO dead...' Ron thought remembering his love for Kim back in his home town.

He remembered his passion for Kim. Completely, after so many years then friendship, Kim admitted it, she like him. He leaned in for a quick smooch, but it immediately turned more passionate as Kim arms snaked around his neck, her fingers running through the messy blond hairstyle. She closed her green eyes, and her tongue seeking his when he opened his mouth, she sighed a moan. She could feel his palms roaming her backward as she pulled his body closer to hers. Kim moaned in pleasure and felt his large hands squeeze her butt, than Ron gently pushed the bathrobe off her shoulders, exposing the exquisite naked frame. He traced fiery kisses from her lips, down her neck and to the hollows of her shoulders, breathing in the scent of her brown hair and continued to kiss her, his hands ran up and down her arms where Kim legs were already around Ron's waist. He let go, and he tried to move his palm away from her bottom, until she just put it right back there. "KP, your so pretty..." He looked deep into her green eyes. "I choose to be with you tonight after our cheer practice was over. I love you, KP." His love for her traveled so far beyond into something more.

Kim placed her hands over his belt. "I have loved you as Ronald Dean Stoppable, all my life. I wish to be with you, now and forever, I like you more than a friend." Her robe open more, and she reached for the belt on his pants and both took place to the bed as Kim kiss him and her frame melts into the darkened, disappearing into nothing with a new person appeared to him of a ninja young woman moaning in pleasure.

His throat tightened with guilt as his mind tumbled, and dropped, and continued down through an eternity of blackness. The next wave in his mind of Yori seduced him, she kiss him. Ron moan into the kiss. A massive breast came out at him through the dark haze. Twisting to the side, he redirected the breast on his lips. Yori breast pulled back into his face. Yori other hand touch his tool. This time, Ron groan and told Yori this isn't right, but he gave in at her kisses. Silence took place and the quiet sounds of sex that was muffled through the school room.

Oh Ron-San! Returning with more shouts was Yori in response. And then another. She continued to ride Ron. The blonde was cast into blackness, all turned to black on a naked ninja girl. The only thing he could see was the memory of a ninja girl naked that wasn't Kim, he felt guilty, it was showed a signal for angry of his soul to lock down on what he did as he collapsed on the streets, he cheated on Kim, isolation tugged at his inteintellect to fall into oblivion of guilt and betrayal towards Kim but he keeps coming back toward Yori and wanted more sex of her, it's been months since he have sex and Yori gave him passion on his trip.

His eyes slid locked on a naked Yori; Ron had anger with cries in his mind on what he done.

Ron was still talking to Kim on the phone, naked. A night lamp was on in the far corner of the room, and he stared at it than at a naked Yori. He gawked out the window at the clouds, then look back at Yori naked beauty.

Beauty is such a pain, and he really didn't mean to have sex with another girl.

They have been dating for two months in secret without people from school finding out about his new relationship, even his Sensei, they had not tell the students that they're dating in secret, much to Yori, she's willing to keep their sex a secret from Sensei or they will band her from school.

Ron shut his eyes and let out a deep breath feeling Yori hand drifted down a slow trail on his cock, causing Yori to grin, she's swallowed around him letting his shaft slide along her tongue until it hits the back of her throat, her saliva slathered on Ron cock everytime it pulls out of her mouth.

Yori have the best blowjob Ron ever better than Kim.

Ron gasped by covering his mouth and arched his back. His hands twitched to reach up and cup Yori black hair.

Her tongue traces the cock before swirling around the tip, tonguing his slit a few times before making her way back down to suck his cock into her mouth. Ron has sex with Yori and she was right he need to have sex on his stay here, Yori made him feel good by having a new lust over her more and more, he still mostly feels guilt for cheating on his Kim to have sex with Yori.

He's so sorry for what he's done to Kim.

Yori sucks his cock until she just can't suck anymore, and then she crawls up his body and kisses him, he gasped out again.

"KP uh I call you back." Ron moan.

"Don't you dare hang up on me Ron." Kim yell.

"Sorry got to go, my teacher call me." Ron hang up.

Yori made a smirk with licking lips when she saw Ron hang up the phone on his girlfriend. She loved his soft blond hair and his well-toned body, enough like her frame was built. Yet she saw sorrow in Ron minds of him having too lie to Kim, she doesn't care, her hairstyle was placed in a ponytail held by a wool scrunchie, she strolled up on Ron body, "Good one, hanging up on Kim-San baby, I'm here where she's not." She put her arms around Ron's neck and lean in to kiss him lightly again which she's let go. "Like my blow job Ron-San, I bet Kim-San don't have a better blow job than me?" Yori said.

Ron getting himself under control. "Yes, Yori," he replied.

"I am good at it!"

"I know you are," Ron pulling her more in an embrace hug.

"You don't need to keep calling Kim-San when I am with you, it's only troubling you more."

"I'm sorry Yori, you have been radical to me even in bed but my gf needs to know I'm ok at least." The blonde said.

The ninja girl shrugged a bit. "I know but maybe I should have sex with you more often, so you will forget about Kim-San." Ron couldn't promote a grin at the sight of a naked Yori. After their late night mate session, she had sex with him, and she make-out with him, ended up into mate session. Ron had to admit Yori was glowing today.

He seen Yori was so beautiful. Her body was toned and well- endowed. He likes her raven hair and Yori caramel skin. Yori had a grinned, and placed a couple fingers over her mouth, meaning she was in serious mode. "Now forget about calling Kim-San, be with me."

Opening her eyes, she saw Ron lying beside her, when she felt his lips kiss her forehead, making her smile again.

Ron chuckled for a long moment and he laughed. "Well Yori you started this, you with me. I'm not talking to KP on the phone anymore" he throw his phone on the floor which a text message been send by Kim.

...

'Ron pick up.'

Yori narrowed her eyes, grinning and saw Bonnie text.

'Ah, Kim-San, Ron-San is mine, bitch... do some hero work and leave Ron-San alone, he's mine.' She thought in her mind.

The ninja young woman was there for Ron even on his stay here in Japan, she comforts him when he was down on his training, and she wants to make him happy since Kim isn't here.

"So, my mind is off on KP." Ron gestured to his new sex partner, "what do you think we should do this morning, watch some TV? Eat breakfast. Hang out outside before training starts." Her brain has an idea all right as her lip curled into a smirk. Yori straddling him to sit down on his naked lap, her arms encircling his flesh neck even Ron arms wrapped around her waist at the same moment she buried her face into of his neck. His voice tone gave a slight smirk.

"Let's have fun!" The ninja young woman said.

Ron grinned when he kissed her back and sniffed her black hair. "Yeah. Let have fun. I can do that."

So that was what they did for some time - kissing, necking, petting, and just being in each other arms. That was until Yori's took control of her, making her hands roam under his body and her lip kiss him more forcefully and than before.

The blond boy explored underneath her nude body and returned her kisses in equal intensity.

After breaking off a long, tongue-lip lock to breathe, Yori looked into her boyfriend's face with a grin. "I need you now, Ron-San," she quietly growled.

Ron lick his lips and before Yori knew it, she was thrust up onto the bed, and she gasped in as Rufus woke up, and the little guy cover his eyes seeing a half naked Yori, and was disappointed seeing his buddy cheating on Kim who he'd didn't say anything as he leaves the room to get some cheese for breakfast. Before Yori could even say anything, she felt Ron's hand further underneath her butt, and her breast bounce.

"You need me, ninja girl?" Ron growled slapping her butt. "You'll have me. You forced me to have sex with you, and today I'll be calming this hot ninja frame." His mouths curled up, knowing he was going to enjoy sex with Yori again.

Yori smirk at her man and she knew Ron didn't waste time as he pressed his lip over her nude back with a lick that forced her melted as she felt him enter her from behind. All Yori could do was whisper his name out.

"OH-RON-SAN!"


With Kim;

Kim, the head cheerleader- on top the food chain. She was standing by a locker looking at her phone waiting for her Ron to call her back. Kim was dressed in green skirt and pink t-shirt, which hugged her shapely figure, as the redhead wait for her bf to call back, the redhead can't believe he never call back, 'he must be busy, so like ok maybe I need to do something.'

Far as the redhead was concerned she needed to hang out with her fashion friend Monique.

"Better hang out with Monique!"

Kim made her way toward the lunch and have a girl meet up with Monique and need to stop calling her bf so much and worry for her Ron, she knows he can take care of himself sometimes.

/

Back In Japan:

Ron grin watching Yori press her hand against the wall and swing open to reveal a massive bedroom door. Ron stared at Yori big butt bounce which cum was on her butt as she started walking down the hall to the hotel shower. She paused for a second and glanced back.

"Ron-San, I need a shower so I can clean your cum off. I was wounding. Are you going to join with me or just stare at my cute cum butt." The naked Yori smirk and saw Ron stare at her perfect butt, making him hard right away again. "You coming or not Ron-San?" Yori called out to him with a sexy seductive smile, shaking her oil cum butt that move in slow motion.

'I'm coming, Yori." Ron walk up to her and the nude ninja smirk by grabbing her secret bf hard cock in her hands leading Ron-San to the showers and the ninja girl closed the door shut.

AuthorNotes: In this story Ron is having an affair with Yori by cheating on Kim. This story will have betrayal and lies, guilt.

What do you think? Leave a review of your thoughts of this new affair story.