A few years ago, Yumi's husband passed away, and she lives with her son. One day, Yumi peeks at her son having sex with his girlfriend and becomes aroused, touching herself. In the midst of this, their eyes meet. Unable to hold back, Yumi, despite knowing it's wrong, finds herself desiring her son. Her son also regrets having a relationship with his mother but finds himself becoming engrossed in her body.
