Kota, who grew up in a single-mother family, was pampered by Yui even when she became a college student. Yui was a single-mother family, so she didn't want to have a hard time, and she spoiled Kota, so she realized that it was her fault that Kota became a mother's boy. Kota is already in the third year of college, but he can't go out into society as it is. Yui invited Kota to a hot spring trip, hoping that she would become independent.