STSK-157 ``I'm going to study hard for the entrance exam, so please tell me naughty things...'' A student who is usually serious seduces Katekyo... Even though he understands that it's not good, he can't resist and has sex with her, ``Just let me come inside~'' - !” 12 female students who are locked deep inside their vagina with crab scissors and beg for creampie over and over again. 300 minutes special