To A New You summary:

Sakuma, a teacher at an all-girls school, sees his wife in the red-light district cheating on him one day. In response, he runs away and decides to tour Japan, going wherever his heart may lead him. He finally reaches Odawara and meets a young girl, that looks like the one he always sees in his dreams. He barely manages to stop himself from crossing the line with the girl, and he eventually returns to his normal life, having discovered that his wife's alleged cheating was all a misunderstanding. But then...