This sounds very stupid. Considering it's my own pfp. It's been years since I read it and can't figure out what it was I read.
This I think? I'm not sure tho
https://www.mangago.me/read-manga/different_kings/
Chapter 70 hitting too close to home. Not a twin, different birthdays. Exact same taste. Listen to the same music wanted the same toys, same clothing style. Literally so annoying same food too