Shinobu, a son who was planning to leave his family home for college, couldn't bring himself to make the decision because he felt bad about his mother, Yoko, being treated roughly by his father. However, no matter what unreasonable treatment she endured, Yoko always smiled, and Shinobu eventually developed feelings for her that went beyond those of a son... One day, Shinobu witnessed his father forcibly assaulting Yoko. As his father's behavior escalated, Shinobu could no longer bear it and finally stepped in to protect Yoko. But Yoko, moved by his kindness, couldn't hold back her surging emotions and impulsively pushed Shinobu down…
