"Futa girls can't get normal girls pregnant?"
Fubuki and Mutsuki were sitting together at the table in their dorm, just chatting. After some idle conversation about recent missions and training exercises, the topic had shifted to the usual talk.
"Oyo? Oyo, no, not at all. Your balls don't produce any sperm, they just control your sex drive, nya" Mutsuki said, and Fubuki nodded. "So how was your first time?"
Fubuki smiled. "It was so much fun. Jintsuu is a great partner, she really helped me out. Both with my arousal and with teaching me about how to last longer."
"Oyo, no girl likes a premature ejaculator. If you're doing oral or anal, then it's OK to cum as fast as you want, though" Mutsuki explained. "Jintsuu said you have quite a bit of energy, nya."
"I guess" Fubuki said with a sheepish smile. "Say, Mutsuki-chan, how exactly does all of this work? Like, how did the Admiral figure all this out, and how did he figure out it was so important that us futa girls get our release?"
"Well, sex is important, nya? It's a great way to burn off stress, or jitters, and it's just really fun! As for how it all works, well, it's like I said. If a normal shipgirl is interested in helping out her friends, then she can volunteer to be a helper. She picks what kind of acts she's comfortable with, and then she's issued a uniform declaring those acts, written above the left breast. Oral, anal, and vaginal are the most common, nya."
"Are there other ways to find relief?"
Mutsuki seemed to think about it for a moment. "Just handjobs and footjobs, nya. The handbook covers everything, I guess. From threesomes, to kinks, to everything else."
"Um, threesomes? Kinks?" Fubuki said, and Mutsuki smiled.
"Some girls, with marks for two or more acts, like having two partners at the same time. Some girls like being spanked, or tied up, or...made to do other things, nya? These things aren't printed on the uniforms, but a volunteer can ask a futagirl to do something special for her. You can ask, too, if you know a volunteer likes sex a certain way."
Fubuki nodded. Jintsuu hadn't asked for anything out of the ordinary, except to tell Fubuki to hold off from cumming too quick, which gave Fubuki an idea. "Jintsuu-san, when teaching me how not to cum prematurely, made me wait a bit with my cock outside of her. Is that a kink, too?" Fubuki asked.
"Yeah, kinda. Some girls like controlling when their futa partner cums. It's called edging. Most futa girls find it frustrating, nya, but it's important that both girls be happy, got it?" Mutsuki said, and Fubuki nodded.
"Mutsuki-chan, you told me that you weren't available right now. Were you a volunteer at some point?" Fubuki asked, and Mutsuki nodded, her smile gone.
"A long time ago. I'll...explain it another time. There's nothing stopping me from being a volunteer, but if asked I'd say no. It's...complicated" she said. "That means we can't have sex, no matter what."
"Got it" Fubuki said with a reassuring smile. She offered Mutsuki a hug, which Mutsuki gladly accepted. "So the condoms are just for making futagirls last longer?"
"That's right. Wearing a condom dulls the stimulation a little bit. If you struggle to last long enough to satisfy your partner, then you can wear a condom. They're free, nya" Mutsuki said.
Before Fubuki could ask another question the door to their dorm opened and Yuudachi stepped in, looking tired. She shuffled over to the table and dropped to the floor, sprawled out.
"Jeez, Yuudachi-chan, are you alright?" Mutsuki asked, and Yuudachi mumbled.
"Yeaaah, poooi... Tired and horny, poii."
"Why don't you go find Naka or Jinstuu? They should've finished with their baths by now, so you could at least get a blowjob or something, nya" Mutsuki said, and Yuudachi groaned.
"I'd probably, like, fall asleep in the middle of it, poi" Yuudachi replied, and sat up. Her hair was frazzled and she was having trouble keeping her eyes open. Fubuki felt kind of bad for her; being tired and horny at the same time had to be a nightmare.
"I guess I'll, like, go try. See you two later, poooi..." Yuudachi said, and got to her feet. She shambled out of the room, leaving Fubuki and Mutsuki alone again. They shared a look, shrugged, and went back to their conversation.
"Can you tell me about cross-class sex, Mutsuki-chan?"
Yuudachi slowly walked down the hall to the Light Cruiser dorm, the door open, and stepped into the room. Sendai and Jintsuu were sitting together by the window talking, and looked up to see who'd came in. Naka had just walked out of the bathroom, her hair wrapped in a towel, her body clad in pink PJ's.
"Hello, Yuudachi-san, did you need something?" Jintsuu asked, and Yuudachi nodded. She turned to Naka, who regarded her with wide eyes. The idol was still drying her hair, rubbing the towel over her head.
"Naka-san, blowjob please, pooii" Yuudachi said, and Naka rolled her eyes. She finished drying off and walked over to the beds, and Yuudachi followed her. Yuudachi dropped onto the bed and nearly passed out before she felt one of Naka's hands travel up her leg and start stroking her cock through her pants. The sudden touch sent a jolt through Yuudachi, and she smiled wearily. She watched as Naka got down on her knees beside the bed and pulled Yuudachi's pajama pants down, along with Yuudachi's panties.
Without even a moment of hesitation Naka began licking Yuudachi's twitching shaft, causing Yuudachi to moan. As much as she talked about being an idol, Naka was quite adept at blowjobs, as Yuudachi had found out. She didn't have marks for anything else, but right now that was fine with Yuudachi.
"Mmmhh, Naka-chan~" Yuudachi whispered as Naka began bobbing her head up and down, her tongue tending to Yuudachi's tip while her lips glided along the rest of Yuudachi's cock. Naka had placed her hands on Yuudachi's hips, her arms keeping Yuudachi's legs in place. Yuudachi groaned appreciatively, the back of one of her hands to her forehead. Yuudachi didn't get blowjobs nearly as often as she'd like, being that so few of the volunteers were willing to give them.
Naka reached the base of Yuudachi's cock and stayed there a few moments, letting the back of her throat tighten around Yuudachi's tip. She pulled back until just Yuudachi's tip was in her mouth, and she slurped before bobbing again. "I love Naka-chan's blowjobs, poooii..."
Yuudachi felt one of Naka's hands move to her balls, her fingers gently stroking the plump orbs. Yuudachi's moans picked up as Naka continued, and she squirmed against the intense stimulation. She peered down at Naka and caught sight of Sendai and Jintsuu sitting by the table, watching the two of them intently. Sendai was pitching a major tent, making Yuudachi wonder why she hadn't just bent Jintsuu over the table and stuck it in her already.
Naka popped Yuudachi's cock out of her mouth and began kissing and licking the tip instead, using the break to catch her breath. Yuudachi sighed at the blissful touch, finding the way that Naka's warm breath blew over her cock, wet with Naka's saliva, quite pleasant. Naka even licked Yuudachi's scrotum a few times, a move that made Yuudachi hum with appreciation. She moved to put Yuudachi's cock back in her mouth and Yuudachi put one of her hands on Naka's head, to keep her in place.
"Keep going, pooii~ You're, like, the best at sucking cock, Naka-chan..." Yuudachi said, closing her eyes again. She curled her toes and could feel her balls pulling tighter and tighter to her body, and knew it wouldn't be much longer. She kept her hand on Naka's head, her fingers in the other girl's freshly washed, silky hair. Faster and faster her orgasm approached closer and closer, and her breathing became deeper.
"Gonna cum soon, poi" Yuudachi whispered, and opened her eyes to watch Naka bob her head up and down. She looked over at Sendai and Jintsuu and saw the two of them naked and embracing face to face, holding onto each other tightly. There was no doubt that Sendai was balls-deep in her sister, and Yuudachi watched them a moment before closing her eyes again. "Naka..." she huffed. "Naka-chan, poi... Gonna... I'mmm~"
Yuudachi was quiet as her orgasm began, her cum surging out into Naka's mouth in thin ropes. Her cock pulsed and her body quivered, the spunk pooling in Naka's mouth. Soon enough her body was spent and she was left with a smile on her face, her exhaustion racing to catch up with her. She watched Naka swallow with her cock still in her mouth, which made Yuudachi yelp. A few minutes after her orgasm had already ended Yuudachi watched as Naka's face became flushed and she squeezed her eyes shut, and Yuudachi realized that Naka had been masturbating as she sucked Yuudachi off.
Naka's own orgasm ended swiftly as well and she finally took Yuudachi's shaft out of her mouth. She produced a few tissues and used them to wipe off her mouth and the few drops of seed that had remained on Yuudachi's cock. "Thank... Naka..." Yuudachi whispered, and fell asleep right there on Naka's bed.
"Geeez, Yuudachi-chan" Naka complained, and looked over to her sisters. Sendai was seemingly about to finish with Jintsuu, her pounding deep and erratic, her arms wrapped tightly around Jintsuu. She watched the two of them go at it until Sendai came, her face buried between Jintsuu's breasts to stifle her cries of pleasure. Naka let out a ragged breath, feeling the aftershocks of her orgasm, and pulled her hand out of her PJ pants. She used another tissue to wipe her hand off before she climbed into bed with Yuudachi, watching her sisters clean each other off and prepare to climb into their own beds.
Naka took a deep breath as she settled into bed, catching the scent of Yuudachi's soap and shampoo, mixed with the unmistakable odor of sex in the air. She took Yuudachi into her arms and spooned her, and with the two of them cuddling, it wasn't long before Naka joined her in sleep, a smile on both of their faces.