Worried about Saeko, who now lives alone after her husband is hospitalized, her daughter and son-in-law come to live with them. Saeko is grateful for their kind consideration and plans to support the couple from behind the scenes as they eagerly await a child, but... After living together for a while, she learns that the relationship between the daughter and son-in-law is not going well. Wanting to help the young couple, Saeko offers to mediate, but the discussion ends in failure. This is no surprise, as the reason the relationship between the couple has deteriorated is because the stepson has been Kokoro by Saeko's seductive charm...