Responses
https://www.mangago.zone/read-manga/my_darling_is_a_foreign_crybaby_official/
I don't think this is it, but the character description is similar if you want to try
beta
Its gonna be a very confusing description but im gonna try. So its a side story that is focused on more near the end i think and the top had silver or white hair and was taken care of by his crush when he was a little kid and when his crush was a young adult or teen and the bottom had black hair and they reject the top like alot but in the end get together