Kota, who grew up in a motherless family, was spoiled by Yui even when he became a college student. She didn't want to make Yui a hardship because she was a mother and child, and she spoiled Kota and raised her, so she realized that it was her fault that Kota became a mother's boy. Kota is already in his third year of college, but at this rate he won't be able to go out into society. Yui invited Kota to a hot spring trip, hoping that it would be an opportunity for her to become independent.
