The story of a certain boy. Several years ago, his parents divorced due to his father's infidelity. After that, he got a new mother. What is commonly referred to as a stepmother, I suppose. So, he has two mothers. The woman who gave birth to him and raised him thus far, Terasaki Izumi. And the stepmother, Otonashi Kaori, who treats him kindly despite not being related by blood. Setting his father Tatsuo aside, he thought that a simple, happy life awaited him under the same roof with these two important people...
