A chain reaction caused by chance! ? Our lives have changed completely since we entered a school that was an all-girls school until last year and has become co-educational this year! I had never been approached by girls in my class before, but just because I'm a naive guy who doesn't have any immunity to girls, I became somewhat popular and started having sex with him!

A girl who secretly gets excited when she sees a boy's erect penis at a school that has become co-educational this year. And I can't stand it anymore so we have sex after school! A female teacher happens to see a student doing naughty things in the classroom. A male student sees a female teacher who gets excited after seeing this. A female student sees a male student who gets even more excited and has an erection. Everything is connected by erotic lines! The fascinating estrus chain cannot be stopped!