A young bride, Mikage, is soon to be married to Youiti, the son of the chairman of a supermarket chain. Because Youiti insists, she moves in to stay with him at his father's big house to prepare for their upcoming wedding. His father has taken on a young wife, Yukino after his first wife, Youiti's mother Maeda passed away. Despite his old age and his heart problem, he is quite a sex maniac.