This role-play is performed by adults. ``Thank you very much, sister-in-law.'' ``It's okay, I'm sure you'll do anything to thank me.'' Yuya gets angry with his wife over a trivial thing and ends up leaving the house. He promises to do whatever he can to thank his sister-in-law, Natsu, for offering to mediate. As soon as that promise was made, Natsu approached, fully exposing his lustrous pure white body. Yuya is pushed away by Natsu's pretty smile, but even though he knows it's no good, he can't resist Natsu's temptation...