The first time Harumi and Yuzu had sex, it was because Yuzu was a hot mess.

It was clear as day to Harumi that her new best friend harbored some pretty intense feelings for Aihara Mei. Sometimes Harumi had to press her lips together to bite back a smirk when she would catch Yuzu very obviously thirsting for the raven-haired beauty. Girls with crushes on the Student Council President were not uncommon in Aihara Academy, but the longing that Yuzu exhibited towards Mei was on another level.

Recently though, Harumi was starting to worry about her friend. Before, Yuzu would just have a dopey grin on her face whenever the aloof Student Council President deigned to look at her, but now it seemed like the girl was practically being tortured by Aihara Mei's very existence.

The blonde became withdrawn and quiet, often staring off into space. She would stare at the back of Mei's head in class like she was trying to scry the future in the girl's obsidian tresses. Whenever the two girls were in close proximity to each other, Harumi could see a visceral reaction from Yuzu, her body tensing. Harumi couldn't figure out if it was from fear or lust. Probably both. Always a confusing combination.

It was almost bizarre to watch, this little drama that was unfolding before her eyes. Was she the only one seeing this?Probably, because very few people in school were aware that Yuzu and Mei were stepsisters, much less that they slept in the same freakin' bed.

Sleeping in the same bed with an ice princess that you had the hots for? Whew. That's rough. No wonder Yuzucchi acts like she's got an acute case of blue balls.

The last class for the day was dismissed, and everyone started packing up their things.

Yuzu watched Mei walk to the door like a dog being abandoned at the pound. Once Mei closed the door behind her, Yuzu slumped over her desk, forehead knocking on the wood. Like now that Mei was gone, all the life had left Yuzu's body.

Harumi tipped her chair back and groaned inwardly. Oh my god, so dramatic. Pretty sure she's crying.

Harumi put her face in her hands and dug her fingertips into her forehead, trying to stave off the headache starting to pulse from the back of her head. This is so painful.

She walked over to the lifeless body of her friend and crouched down to look into Yuzu's face. She nudged her arm and asked, "Hey, you okay?"

Yuzu made a keening noise that was a cross between a wail and a groan. Harumi was startled and jumped back a little. Yuzu lifted her head a little and looked at her with watery eyes.

"I'm good, I'm good," Yuzu said with a forced smile. "Hey, I hate to ask you this, but can I stay over tonight too?"

"So what you're saying is, you started fucking Yuzu-chan because you're her best friend and she was so…" Matsuri's brows furrow. "Sad?" she finishes incredulously.

Harumi shrugs and says sheepishly, "I mean…yeah, kind of."

"Just…no. I mean, I don't offer to have sex with Nene-chan whenever she's sad and crying over another straight girl she's fallen in love with!"

Harumi knows now is not the time to be funny, but she can't resist smirking, "You could if you were a good friend…"

"That is not what you do when your friend is SAD!" Matsuri hollers.

"Babe…you had to be there. This was more than just sad. She was in a dark place. I had to pull her out of it."

Harumi couldn't sleep because of Yuzu's tossing and turning. The blonde was restless in her futon, shifting to lay on either side, and then on her stomach, and then on her back. Harumi could hear the despair in Yuzu's long sighs. Harumi's heart clenched at the thought of sweet, kind, cheerful Yuzu being tormented by her feelings for the cold, distant, aloof Aihara Mei.

Oh Yuzuchi, why did you have to fall for Mei, of all people. Who is your stepsister. Who probably views love as a handicap. Who is the last person to get involved with – a gyaru like you.

What were you thinking, bro?

After hearing another unhappy mewl the blonde, Harumi slipped out of her bed and padded softly to Yuzu's futon. Yuzu looked up at Harumi standing over her, and the brunette studied her friend's face for a moment. There was just enough moonlight from the window to make out the tight smile on Yuzu's face, but Harumi could see the turmoil in her friend's features.

She went down on her knees as Yuzu lifted up one side of the blanket and Harumi crawled inside. They shuffled for a few moments as Yuzu turned on her side and Harumi spooned her. She hooked her arm across Yuzu's chest and gave the blonde a small squeeze.

"Yuzu…what's going on with you?" Harumi said softly.

"It's nothing. I'm fine," Yuzu said unconvincingly. "I just can't sleep."

"Yeah? Well you sound like you're being tortured over here," Harumi said, nuzzling Yuzu's head, the golden locks tickling her face. Her hair smells great. Is it that shampoo she bought the other day?

Yuzu sighed contentedly at the pleasant feeling of Harumi nuzzling the back of her head. She wriggled slightly and scooted herself back farther against Harumi's warm body.

"Sorry. I just make weird noises when I'm thinking."

"What're you thinking about?"

Harumi felt Yuzu's chest expand in a sigh.

"Just stuff. All this stuff with Mei…. It's like everything I do is wrong. I make her mad all the time."

Harumi frowned behind Yuzu's head, frustrated that her best friend still won't tell her the real deal with Mei. Does she think I'll be weirded out because she likes a girl? Or because said girl happens to be her stepsister? Harumi bit back her questions and instead just hummed in weary exasperation, "Mmmmhhhmmm."

Yuzu shivered at Harumi's breath on her neck, her elevated shoulder rising reflexively. She inexplicably felt really warm under the covers. Yuzu flipped off the part of the blanket covering her and she turned around to face the other girl. They stared at each other for a few moments, laying side by side.

"I just keep messing everything up," Yuzu continued. Yuzu knitted her brows together and worried her lower lip in consternation. "I'm such a bad sister."

She's so cute when she worries.

Harumi brushed Yuzu's fringe from her eyes with the tip of her fingers and said, "You do not mess everything up. You're kind, and funny, and brave," Harumi said softly, hoping she sounded genuine, because she was telling the truth. "You saved your sister from Amemiya-sensei, trash human. You're a great sister."

Yuzu chuckled. "At least someone thinks so." Yuzu smiled as she gazed at Harumi.

Clouds shifted beyond the bedroom window, and Yuzu's face was bathed in the moonlight for a few moments. Pink, full lips in a gentle lilt that lifted delicate cheekbones. Her soft golden curls fanning out on the pillow under her. Yuzu's smile always shone through her eyes, but with the moonlight reflecting off the emerald irises, the effect was dazzling. Yuzu is so damn pretty. With those iridescent emerald eyes trained on her, Harumi felt a pull.

Harumi's eyes slid shut and she leaned forward and planted a soft kiss on Yuzu's cheek. Drawing back slowly, she murmured, "So quit worrying about Mei-san. She'll come around."

"If you say so," Yuzu said, draping her arm across Harumi's waist and scooting her body an inch closer towards the brunette. Harumi's lips felt so soft and nice on her cheek, she instinctively tilted her head towards Harumi's face, wanting to feel those lips again.

"Trust me on this, Yuzuchi. It'll be all right." Harumi placed her palm flat between Yuzu's shoulder blades and pulled the blonde towards her, closing the distance between them. She rubbed small circles on Yuzu's back.

"Mmmmmm….right," Yuzu agreed as she settled her head on the crook of Harumi's neck. This was the only comfortable place for her head in their current position, obviously. She breathed in deeply, Harumi's scent filling her senses. Yuzu felt very conscious of Harumi's body against her, her soft, sweet-smelling, gorgeous body. Yuzu also became aware that her thoughts were a little odd. Harumi was her best friend. And best friends don't get turned on by each other. She furrowed her brow and mentally shook herself.

"I have a sister all my life, and you've only had yours for like a few weeks. I'm pretty much the expert here," Harumi said.

"Oh so you're the sister whisperer now?"

Harumi tilted her head back in a bark of laughter. Her body jerked from the motion, bringing her knee up slightly. Her thigh slipped between Yuzu's legs.

As if in a trance, Yuzu slowly nudged Harumi's shin with her heel, pushing Harumi's thigh higher, until it was fully between her legs.

Harumi chose to ignore the sirens in her brain that bleated holy fuck Yuzu is literally straddling my leg and continued, "Shut up. But I mean, Mitsuko is kinda intense. Especially when she was in high school."

"Mmmmhhhmmm," Yuzu hummed and angled her head towards Harumi's neck, pressing her lips together tightly to stop them from connecting with the brunette's flesh.

"She still scares the shit out of me actually."

Yuzu's released the breath she was holding to chuckle. Upon feeling the blonde's warm breath on her neck, Harumi moaned.

The small sound from Harumi sent heat rushing to Yuzu's core, arousal pooling like warm honey. A distinct ache pulsed between her legs, almost to the point of being uncomfortable. It sort of tickled, definitely ached, but most importantly, throbbed with want. Yuzu pressed down on Harumi's thigh, eager to relieve the pressure.

Harumi closed her eyes and swallowed. This is fine. This is absolutely fine.

Then Yuzu started to grind against Harumi's thigh, slowly and hesitantly. As if maybe Harumi wouldn't notice, or mind, if she was doing it discreetly. Harumi had a second to think oh never mind we are not fine, before coherent thought escaped her brain. Yuzu tilted her hips forward for leverage and was now undeniably grinding against her leg.

Harumi trailed her hands down Yuzu's torso and grabbed her hips. Holding on to the blonde, she rolled on her back, bringing Yuzu on top of her. Yuzu didn't miss a stride and continued to rock her hips against Harumi's leg, picking up a steady rhythm.

Harumi saw Yuzu's face looking down at her, mouth slightly parted and eyes glassy, and

realized that she was pinned under a horny Aihara Yuzu.

Yuzu lowered her head and crashed their lips into a searing kiss. Harumi moaned deep in her throat when Yuzu slipped her tongue in her mouth, plundering it with strong, precise strokes. Yuzu coaxed her tongue in a dance, twirling and slipping, with the blonde leading. The aggressive but expert way she was being kissed left Harumi's mind spinning. Jesus, who taught Yuzu how to kiss?

Harumi felt Yuzu's fingers tug the bottom of her shirt and pull it up. They broke the kiss to let Yuzu yanked the shirt off Harumi in one sweeping motion and then tossed the garment behind her.

Yuzu's mouth returned to Harumi's mouth a second later, with the addition of her eager hands cupping the brunette's breasts. Yuzu squeezed them, a delicious thrill shooting up her spine because she was actually touching a girl's boobs, with no clothes on, and it felt amazing. She had always envied Harumi's décolletage when they were trying on outfits, but now it hindsight it was probably because she just wanted to grope her friend's tits.

After palming the hefty globes, Yuzu flicked the nipples back and forth with her thumbs. The were already hard even before Yuzu had touched them, and when the blonde pinched the erect tips, a moan was torn from Harumi's throat. Each time Yuzu pinched and pulled at her nipples, she felt her clit throb in sympathetic response.

When Harumi felt Yuzu's hot, wet mouth close around her right nipple, she threw her head back on the pillow and moaned even louder. When Yuzu swirled her wet tongue around the sensitive bud, and flicked it back and forth, Harumi's back lifted off the mattress. The sensation of Yuzu's soft, wet mouth on one of the most sensitive parts on her body felt so incredibly pleasurable and erotic that Harumi felt like she was going to turn into a puddle.

Feeling like she had to tip the scale back a little bit, Harumi reached for the band of Yuzu's sleep shorts and tugged down. Yuzu lifted her hips slightly to help Harumi pull them down off her legs. Yuzu settled back to her position straddling Harumi's leg, and she shuddered at the skin to skin contact of her bare sex with Harumi's thigh.

Harumi ran her tongue over her lower lip when she felt Yuzu's wet pussy against her skin. It was hot, wet, and slick against her thigh. Yuzu rolled her hips in slow, tight circles against Harumi's leg. Jesus Christ. Harumi lifted her knee and started thrusting her hips, and Yuzu grasped at her shoulders.

Harumi kept thrusting while Yuzu was grinding down on her thigh full tilt, as if trying to put out the fire between her legs. Harumi's upper thigh was now covered with Yuzu's arousal.

Yuzu's breathing was becoming ragged and her movements more fervent. With a strangled cry, she pitched forward and buried her face in Harumi's neck. The brunette wrapped her arms tight around Yuzu as the tremors of her orgasm rolled through her.

It's was a good thing Grandma was hard of hearing.

x

"For her first time having sex, she was pretty good at it, actually," Harumi shrugs. "She was a natural."

"A natural at what – fucking girls? Fucking her best friend?" Matsuri snaps.

Harumi runs her hand through her jet black hair and sighs. "Look, I don't have to talk about this if it's making you so upset."

"I'm not upset," Matsuri says, consciously making her tone light. "I just…having a hard time wrapping my head around the fact that you had sex with one of my best friends!"

Matsuri crossed her arms and pouted. Harumi watched different emotions flash across Matsuri's face, and from what she could guess, the younger woman was cycling through indignation, jealousy, envy, curiosity, fascination, and maybe even…arousal? Matsuri was incredibly kinky after all, and Harumi wasn't surprised if the thought of her and Yuzu getting it on could turn her on just a little bit.

"I think maybe it's not that I had sex with Yuzu, but that you didn't get to," Harumi teased.

"Wha-no!" Matsuri eyes flashed in anger.

"Oh come on, babe. It's okay. You can admit it." Harumi giggled. "Too bad that Mei cockblocked you into the next century, huh?"

"That's not funny," Matsuri hissed. "Dude, she kissed me. Stuck her tongue down my throat and addled my brain for a good minute. Then that stuff about 'taking back the kiss I stole from Yuzu.' She was batshit crazy."

"Yeah, I would have been terrified. But probably also cream myself at the same time. Because you know…it's Mei."

The two girls solemnly nod at each other in understanding. Aihara Mei was the most gorgeous female specimen they had ever laid eyes on.

"Holy shit!" Matsuri exclaims.

"What?!"

"So if Mei kissed me because I kissed Yuzu," Matsuri's eyes are round as saucers, "but you fucked her..."

Harumi gasps. After that first time in her house, she got really good at helping Yuzu fuck the pain away. She thought of all the times back in high school when she fucked Yuzu ten ways to Sunday and put her away wet. If Mei found out…

"Holy shit!"