Fushidara na Hanatsumi Otoko

Kotaro goes to work as a housekeeper for Ayumi, a relative of his mother, and a man Kotaro has admired since childhood. He became somewhat disillusioned by the slovenly state Ayumi lives in, as well as his lifestyle choices...

Note: Chapters 14, 17, 23, 26, and 30 to 33 were split into two parts in the original serialization.