278GGEN-015 I was locked in a room where I couldn't get out unless I had sex with someone other than my boyfriend... Mitsuki Nagisa

A mission that benefits no one is the best treat, lol. So, shake your hips in despair, you fools, lol. As usual, on the way home from school, I made a quick detour to the usual convenience store, and then...I have no memory of it.... Where am I? Hey, why are you here? A locked room where mysteries only lead to more mysteries. The only way to escape is to have sex...