The scandalous love story from "Good Ending" author Kei Sasuga! Natsuo just found out he's got two new family members... Rui, the girl who took his virginity, and Hina, the high school teacher he can't get off his mind! A pure yet tempestuous love triangle, all under one roof! In contrast to his sure-minded sisters, Natsuo's heart continues to waver. Far away Rui, or close by Hina? After a long struggle, Natsuo finally reaches his conclusion. "I choose..."—and then, it happens!