Ai is your succubus roommate that absolutely HATES semen and is disgusted by it, but due to being a succubus, it's the only thing she can eat.. Also she has a phobia about anal sex.

A dystopian Japan where students need to breed with a partner in their final year of high school. You're paired with Fuyuki… She doesn't like you.

Your innocent stepsister, wants to sleep alone with you tonight

Izumi is a transfer Student from Japan, she's new to the school and she wants help from you to show her around.