*Click*

Shigure locked the bathroom door and stood in front of the mirror. She turned her head to the right, then left. She flattened out the wrinkles in her shirt and turned to the side. With her shirt pulled taut she could see her full figure; the shape of her curves, her plump breasts, the skin of her legs between her socks and the hem of her skirt. She put her hands to her breasts and gently squeezed, and she turned around. She lifted the back of her skirt and felt along the side of her bottom. She turned back around, lowered the front of her panties, and looked at her pubic hair. She pulled at the soft hairs, the length perfect.

Satisfied, Shigure made herself modest again. The door to her room opened and closed, and Shigure took a deep breath. She took one last look at herself in the mirror, smiled, and unlocked the door. She stepped out into the room, and there Yuudachi was, sitting on the floor by the table. "Hi, Shigure!"

"Hello, Yuudachi. Doing well?" Shigure asked. She sat down right next to Yuudachi and hugged her, and Yuudachi hugged her back.

"Yeah! I just got back from Mamiya's and had, like, a super delicious parfait! What are you up to-poi?" Yuudachi asked. Shigure got onto her knees, turned, and straddled Yuudachi. She rubbed her hands on Yuudachi's shoulders and looked into her sister's brilliant red eyes.

"I'm in the mood. Are you?" Shigure asked, and Yuudachi nodded. She pulled Yuudachi's shirt off for her, along with her bra. Yuudachi undid her skirt and it fell away, leaving her in just her panties. Shigure stripped down to just her socks and kissed Yuudachi. She pulled out Yuudachi's stiffening cock and let it lie between their bodies, the top of it against Yuudachi's stomach and the bottom of it against Shigure's mound. She grinded her hips and let her pubic hair rub against the sensitive underside, and Yuudachi smiled at her.

"I, like, never knew you could be so assertive-poi."

Shigure smiled back at her and gently grabbed Yuudachi's quivering shaft. Her tip was perfectly wrapped in her foreskin, her tip sticking out a bit and a little drop of precum already glistening in the light, and Shigure put a hand on Yuudachi's cock. "This is my favorite part; the anticipation. Peeling back your foreskin, exposing your tip, stroking you, seeing your balls churn. It's kinda cute how your foreskin doesn't retract when you're stiff, Yuudachi. Gets me excited" Shigure said. She eased herself onto Yuudachi's cock and it sank into her as she went down and down until it was all the way in. Shigure wrapped her arms around Yuudachi, held onto her tightly, and started riding. Yuudachi moaned and put her hands on Shigure's hips, her eyes closed. Shigure kissed Yuudachi on the forehead, earning her a giggle.

"How's everything feel? Good?" Shigure asked, and Yuudachi nodded. She put her hands on the back of Yuudachi's head and pulled her closer until Yuudachi's face was buried between her breasts, and she put her chin on top of Yuudachi's head. "Good~"

Yuudachi moaned into her boobs as Shigure rode her hard, her butt meeting Yuudachi's thighs with a gentle slap each time. Yuudachi's hands fell to the floor and lied there. Shigure smiled, enjoying the fact that she was completely in control now. She started to pant, both from exertion and from pleasure, and moaned softly. "Feels good for me, too, Yuudachi~"

Yuudachi moaned into her boobs and Shigure kissed the top of her head. She put her hands on Yuudachi's shoulders and pushed back, and Yuudachi's hands found their way to her breasts. "I like it when you feel me up, Yuudachi" Shigure whispered, and Yuudachi smiled.

"I like feeling you up-poi. I love how big your boobs are" Yuudachi said. Shigure put her forehead to Yuudachi's and stared into her eyes, her tongue out. Yuudachi was enjoying herself, clearly, and it seemed like it wouldn't be much longer before she finished.

"I love riding you so much. Shimakaze was so right about riding futas, it's so amazing" Shigure said.

"I'll have to, like, pay Shimakaze a visit some time to thank her then. It feels so good with you on top, I feel like I'm gonna pop soon-poi" Yuudachi said. She grasped onto Shigure's hips and Shigure stopped. "Hnnn, please keep going."

Shigure pushed Yuudachi onto her back, her hands on Yuudachi's breasts, and pulled off. She sat on Yuudachi's stomach, her cock wedged up between her butt, and she licked her lips. "Not yet, Yuudachi, I want to finish together."

"But I'm like super close-poi. I...I really need it" Yuudachi said.

Shigure plunged back onto Yuudachi's cock and then pulled completely off, little drops of her fluids and Yuudachi's precum flicking everywhere. She sat on Yuudachi's knees and watched her cock twitch and pulse, Yuudachi's teeth gritted together. She gently stroked Yuudachi's cock, precum beaded at the tip. "Shi- Shigure!"

Shigure squeezed, tugged, and released. She grabbed Yuudachi's hands and Yuudachi looked at her desperately. "Oh no, no no noooo..." she said, but it was too late. Instead of vigorously spurting out in hot ropes Yuudachi's load welled up to her tip and then flowed down her shaft, leaving her unsatisfied. Yuudachi whined the whole time, which made Shigure feel a little bad, but she had a plan in mind.

"Good, now that that's out of the way, let's go again" Shigure said. She eased herself back onto Yuudachi's still hard cock, and Yuudachi hissed at the feeling. She leaned forward, stared down at Yuudachi, and started riding fast and hard again. Yuudachi yelped and moaned, her hands tightly holding onto Shigure's hips.

"OH! Oh, Shigureeeee!" Yuudachi yelled. Shigure licked her lips, panting, sweating. Her breasts swayed and bounced as she rode, her hands on Yuudachi's stomach. Yuudachi had her eyes squeezed shut, but that didn't stop Shigure from staring at her sister's contorted expression. Yuudachi writhed and squirmed, her cock clearly sensitive, but doing what she did was the only way Shigure could make her sister last long enough.

A shudder ran through Shigure and she stopped for a moment, grinding her hips and butt against Yuudachi's thighs, and Yuudachi opened her eyes. "M-maybe I won't thank Shimakaze, if she taught you to do that, poi..."

Shigure licked her lips. "Don't worry, don't worry, I'm gonna ride your little cock until you pop again" Shigure said. She started riding again, her butt slapping loudly now each time it hit Yuudachi's hips. "I can feel you swelling and flaring in me, Yuudachi. I know you want to cum again, don't you? Inside me, right? You want to cum inside- Inside me?" Shigure said, her breath hitching.

"Y-yes..." Yuudachi moaned. She closed her eyes again and put her hands on Shigure's bottom. Shigure hummed at the sudden touch and focused on her riding, pivoting her hips up and down. Yuudachi squeezed and pulled Shigure's cheeks open, and Shigure grinned.

"My boobs, m-my bottom, you like to touch it all, huh?" Shigure asked, and Yuudachi could only nod. Another shiver ran through Shigure and she moaned, her knees shaking. "S-soon, Yuudachi. Soon, soon!"

Yuudachi moaned again and Shigure leaned forward more, her breasts hanging over Yuudachi's face. "S-suck them, please" Shigure said, and Yuudachi's eyes fluttered open. Her mouth latched onto one of Shigure's nipples and Shigure yelped. She clenched and unclenched her butt the way Shimakaze had taught her, and Yuudachi moaned and moaned in response. Shigure closed her eyes, erratically slammed down on Yuudachi one last time, and came. She yelled loudly, over and over, her body spasming hard. When her orgasm ended Shigure collapsed onto her side, Yuudachi's cock popping free of her, and Yuudachi whined.

"Ohhh, I'm close-poi. Shigure, please!"

Shigure shakily rose onto her knees and got back into position, Yuudachi's cock between her butt cheeks again. Yuudachi's cock twitched and pulsed and flexed, and Yuudachi whined and whined, pawing at Shigure's thighs. After a few minutes Shigure was ready, and she gently eased herself back onto Yuudachi. She slowly pivoted her hips up and down, and Yuudachi's cock swelled. "SHIGUREEEEEEE!"

Shigure pushed herself all the way down and held, her head lying on Yuudachi's boobs, and she listened to Yuudachi scream as she spurted hard. Shigure could only lie there, clenching and unclenching herself to help Yuudachi through her orgasm, and after just a few moments it was over, the two of them panting.

"Sorry I...ruined your first one..." Shigure whispered. Her whole body was shaking when she pulled off Yuudachi again and collapsed onto her side, cuddling Yuudachi. She put a hand on Yuudachi's messy cock and started stroking, and Yuudachi whimpered.

"One more, please..."

Shigure hummed and scooted back until her head was on Yuudachi's hip. She pulled the cock into her mouth and lazily sucked and slurped, unable to do any more. Yuudachi moaned and put a hand on Shigure's head, one of Shigure's hands gently stroking her sister's plump balls. It wasn't long before Yuudachi's cock flared up again, this time her moans soft and quiet as she came for the final time, her cock jerking but nothing coming out. Shigure smiled weakly and pulled it out when Yuudachi was done, idly licking it as it slowly softened up and the two of them calmed down.

With the two of them finished Shigure crawled back up and put her head back on Yuudachi's shoulder, a hand on Yuudachi's stomach, stroking up all the way too her sister's boobs and all the way down to her soft privates. Yuudachi shivered and rolled onto her side. Shigure put her hand on Yuudachi's butt and started stroking there, a smile on her face. "I love you, Yuudachi."

"I love you too" Yuudachi whispered. "Don't worry about the first one, the second two, like, made up for it."

Shigure hummed and kissed Yuudachi, who returned the kiss. "Don't think I ever told you why I volunteered, did I?" Shigure asked, and Yuudachi shook her head.

"If you're happy then, like, I'm happy too-poi. Shimakaze taught you, like, a lot."

"Yeah, she did. Sex with you is so special, Yuudachi. I love you so much, you'll always be important to me. But volunteering helped me come out of my shell. It's helped me explore sex and my sexuality, and find new ways to please and be pleased. I thought, when I told you I wanted to volunteer, you'd be against it, but... It was the opposite. You've supported me all the way. Thank you, Yuudachi."

Yuudachi smiled. "I thought you wanted to volunteer because, like, you were secretly super horny all the time and needed to have sex more often."

Shigure blushed. "That's...not it, but I can't deny how fun it is."

"Hehe, yeah, it's loads of fun" Yuudachi said. The two of them nuzzled closer together and kissed again, their arms now wrapped around each other. "But is that, like, the only reason?"

Shigure shook her head. "No. Volunteering has helped me explore my sexuality, but in truth I wanted to bring that joy and pleasure I give to you to every futa on the base. Even if that's not realistic, even if I can't make love to everyone on the base, if I can be there when one of you needs me then that's enough for me."

Yuudachi smiled and gave Shigure another kiss. "I'm glad you enjoy it so much. I knew you would. I love you, Shigure."

"I love you too, Yuudachi."

The two of them went quiet and it wasn't long before Yuudachi fell asleep, wrapped up in Shigure's embrace. Shigure just smiled and lied awake, Yuudachi's soft privates rubbing gently against her knee. The two of them desperately needed a bath, but right now Yuudachi needed her sleep, and Shigure wanted to be there for her when she woke up. The bath could wait, even though Shigure was really looking forward to it.

After all, the tub was big enough for both of them.