Summary: As a favor for his beloved Kobayashi-sensei, Toshiya takes care of Tetsu, Kobayashi-sensei's son. Tetsu does perverted things in other people's rooms whenever he feels like it, assaults them in their sleep, teases, sexually harasses (!?), and is basically a carefree spirit who screws around however he pleases. Toshiya's virtue and patience are at risk! Toshiya's manager from work tenderly grows closer to him (with plenty of ulterior motives ♥) as well. The violent love battle between the manager and Tetsu begins! An extremely erotic story from South Korea about a heated love triangle!