Three years ago, Reina, the mother of Manami, who married three years ago, visits her daughter's home. Asked by her daughter to mend the strained marital relationship and comfort her son-in-law (Tooru) who is tired from work, Reina. Tooru is drawn to the kindness of his beautiful mother-in-law and becomes entangled in her charm... He finds himself desiring his mother-in-law more than his wife and cannot control his lust for this forbidden relationship.
