Shiho is an unfortunate woman. Her marriage only lasted for 3 days because of her husband dead. Shiho then decides to be the guardian of her late husband's little brother, Makoto, who is still in elementary school. 9 years passed, and it turned out Makoto is actually the one who's been taking care of Shiho. In his 18 years old birthday, Makoto asks Shiho (29 y/o) to take responsibility and marry him.