It's been three years since Yuu left home, and her long student life has come to an end in the blink of an eye, and it's finally time for her graduation ceremony. On her way home, a little lonely without her parents, the person who came over with a smile on her face was...her mother-in-law, Yumi. Yuu can't hide her happiness when her mother-in-law, who she secretly considers to be a woman, comes to visit. Yumi, who was excited to celebrate her graduation just the two of them, was taken care of by him.