The story begins when the author is proposed to by Riko, the most beautiful girl in the school. His new married life starts without much understanding. His cute wife follows him around every day, never leaving his side. She is perfect at housework, and her devotion is extreme. She even built a fortune through investment so he can live comfortably. The author is happy but also confused because it's a contract marriage, and Riko isn't in love with him. Or so he thinks. This is a sweet love story of a couple who got married without dating.