Azusa had a lover whom she loved deeply, but she withdrew from her past because she worried about his future as a CEO. After she broke up with him, she found out that she was pregnant with his child, and secretly gave birth to and raised the child single-handedly. Even now, when her daughter is six years old, she remains determined not to see the past lover CEO again. But one day, Azusa has a fateful reunion with her ex-lover, Chihiro. As soon as Chihiro finds out that Azusa, who unilaterally said goodbye to him, gave birth to his child, he attacks furiously, saying, "I want to take responsibility!" Azusa was puzzled at first, but as she saw Chihiro's sincere demeanor and the father and daughter who got along so well, her heart loosened up...?