Ryuichiro's bride, company president Mayumi Kitahara dies, leaving him to take care of her daughter Natsumi. Natsumi moves into Ryuichiro's flat, but he sets to work to be the father she never had.
Ryuichiro marries Mercury Corp Prez Mayumi, but she dies in a car crash. He moves into Mayumi's house. Her 17-year-old daughter Natsumi returns from abroad. Kubota seizes control of Mercury Corp, fires Ryuichiro and evicts the two.
