It's been 3 years since I left my parents. In order to end his love for his mother-in-law Arika, Yu went to a boarding school, but... On the day of the graduation ceremony, look at her smiling face. I felt the feelings that I had hidden deep in my heart welling up again. That night, after the two of them celebrated together, Yu took her to the inn. Yuuka, who had noticed his feelings, softly said, "Congratulations from your mother-in-law to you who graduated." Guided by his mother-in-law, he climbs the stairs to adulthood again.