Mr. He, He Loves It so Much!

He was the former school belle, an unavailable existence in the eyes of all girls. She was the school belle, two years younger than him. He came to her rescue a few years ago, and a letter of confession that fell into the sea became white rice stuck to her youth coat... When they met again, he called her a "follower", but actually he wanted her to be his follower! The male and female protagonists are both clean