Kaoru, the heir to a major corporate conglomerate, and Nae, a girl who had to live with various relatives since her parents' early death. Born and raised in different worlds, one day she was suddenly adopted by Kaoru's family, and they became father and daughter! Due to their different values, there were many conflicts when they started living together, but they gradually grew closer, until the distance between them finally crossed the line from "family" to become something more...

A story of sweet, forbidden "Oyako" home love!