Kikuchi, who has been away for three years and has no family left, moves next door to the Komori family, who are living a peaceful life. Ai and his girlfriend decide to support the sincere but clumsy Kikuchi. However, Kikuchi fell in love with her from the first time they exchanged greetings, and one day when she invited him to dinner out of her kindness, he pushed her love aside. However, after seeing Kikuchi not only abandon her studies but also deteriorate due to her guilt and regret, her love leaves behind a letter, tells her first lie to her husband, and tells her that she will never give up on her studies. is coming to stay at Kikuchi's house...