Inside

There was no way you'll think rationally after having your very own first sex with someone who you consider an older sister but no less desirable and hot sister. A very hot sister who has taken you inside her and made you a man. While the reason people have sex differs, there is only one true goal the nature intended.

You put your hands on Shizune's hips and keep pushing a few more times as you begin to fill her with your seeds. While she realize what you're doing, Shizune didn't pull back, instead letting you do what you want. After you have finally emptied your cum inside her, she let herself lie on your body, relaxing at the relief your mutual orgasm has brought.

"How was it?" she ask after being quiet for a few minutes.

"it's great."

"I think so too." she then giggled. "You know, we forget to lock the door just now. Somebody might have walk in by surprise."

"Wouldn't anyone hear what we're doing just now?"

"Having sex?"

"Yes, having sex." Even then the situation of you having sex or, dare you say it, fucking Shizune seems so unreal. "You were moaning just now."

"And you growled my name while on orgasm just now... but don't worry. Each room has auto privacy jutsu so people wouldn't listen to private medical consultation. But I think we should lock the door."