Father Shin'ya was deeply troubled by his son Akira's complete inability to study, and upon learning that his coworker's wife, Yui Hatano, worked as a private tutor, he decided to ask her for help. Yui arrived at their home, treating them with polite and serious demeanor, quickly earning Shin'ya's strong trust. However, what awaited him was a shocking twist—Yui's true nature was that of an insatiable, lustful woman starved for young men!