Kazuo is divorced. Achieved one size younger Kyoko and remarriage, and sent happy newly-married couple life. However, one of Kazuo son, Kimihiko comes to hold special feelings in the Kyoko which is Stepmom. Kimihiko who peeped into the love affair of performed parents was not able to control feelings of the So gradually every night. Kazuo introduces a younger student, Eri of the Kyoko to Kimihiko for the son who cannot stand on his own feet forever….
