Kyoko watched as the boy jumped up and down, up and down. She'd finally managed to convince him to try working out to build some muscle on his small frame, especially after he'd demonstrated his inability to lift something for her, when it should've been fairly easy.
"How many do you want me to do again?" He asked.
"One hundred to start with." She answered. He groaned, but kept going, silently counting to himself. She hadn't been paying attention to how many he'd done already, but she trusted him to actually do the right amount. Instead, she looked down at his clothes.
It had taken some effort, but she'd managed to convince him to take off his jacket, assuring him he would get way too overheated. So instead he was wearing some thin black pants and a thin white shirt, which showed off quite a bit of skin. As for her, she'd gone with a simple black sports bra, and shorts. Normally she wouldn't have gone in such little clothing on her top half, but…Makoto was a good guy, she trusted him, even with showing off some of her body.
With that, she started to do her own jumping jacks, bouncing up and down on her feet with little effort as she raised her arms. Makoto looked over at her, and she hoped seeing her doing the same would help to encourage him. Though something seemed weird with his expression, she didn't question it.
She wasn't sure why she did it, but after a few moments of doing this, Kyoko's eyes wandered down, and went wide as she saw something. A very, *very* distinct bulge in Makoto's pants. She wasn't dumb, she knew immediately it was his dick. But…what she wasn't aware of…was just how big it was. For such a small boy, she hadn't expected him to be packing something so…big. It bounced visibly in his pants, almost as if he wasn't wearing underwear at all.
Now, despite how Kyoko acted, the detective was still a teenage girl with hormones. Seeing that huge dick bouncing in his pants…immediately turned her on. She could feel her nipples becoming hard, stretching against the fabric of her sports bra, where she knew he would be able to see it. That made her question what turned him on in the first place, and it struck her. Her chest…of course! The movement of her body and lack of clothing led her breasts to be moving up and down just like his dick…she hadn't even realized.
She started to slow down as her breathing became ragged, growing hornier and hornier as she stared at the dick bouncing in the boy's pants, until she couldn't take it any more. She stopped, looking directly at it. Makoto stopped as well, panting as he looked at her.
"K-Kyoko? Are you okay? Your face is red—AH!" He stopped when she suddenly ran up to him and put her hand on his dick. His body shuddered in response. He stared at her, shocked.
"Th-this…" She said breathlessly as she stroked his cock, feeling it throb underneath her fingers.
"A-ah, Kyoko! I-I'm sorry, I just…your…ch-chest, it…" He tried to speak, but she shook her head, and he shuddered once again when he saw the hunger in her eyes.
"We need to fuck, right now." She said, telling, not asking.
"O-okay!" He squeaked. The next hour became a blur of thrown off clothing, sucking and kissing noises, and a lot of moaning…from Kyoko, mostly.