It's been 3 years since I left my parents. In order to end his love for his girlfriend's stepmother, Arika, Yuu goes to a boarding school, but... On the day of her graduation ceremony, he saw her running towards him with a smile on his face. She felt her hidden feelings for her rise up again in the depths of her chest. That night, Yuu takes her back to her hotel after she gets drunk after celebrating just the two of them. Yuka, who was aware of his feelings, said, ``Your mother-in-law wants to congratulate you on your graduation.''