While acting as a strict teacher, Iona secretly trains her students in sex and raises them to be the kind of girls she likes. If she keeps her secrets carefully, she can enjoy playing with fire for a while. But the situation changes when her student asks for a relationship on school grounds. If she is found out, it will all be over... Iona, who wants to accept the forbidden penetration by a student from school, desperately tries to hold back the moans that escape her mouth and silently ascends to heaven.