BL manga

Want to find a manga I read on an old account and can no longer find it. It's a BL, about two men, one works at a day care where the others brother goes too. They finally kiss in an aquarium, really romantic and slow burner. One of them I think is a university student with the younger brother. Kind of first love type of thing. They become friends at first, I think the one who works in the day care starts helping the university student study. They meet like at a cafe where an accident occurs, through friends idk.