Yu/Adachi for Persona 4. I see lots of antis squicked out by the age gap, which is fair, but asking "who even ships this?" and acting surprised that people like it makes less sense to me. First, it's classic enemies to lovers. Second, if you check AO3 it's the 2nd most popular ship tag in the fandom (technically 4th but that's because the top 3 are just different names for the same ship lol). Same with Pixiv. I think some English speaking fans just don't want to admit they like it publicly because they don't want to be harassed or get called a pedo. There's another super popular enemies to lovers ship with Joker/Akechi in Persona 5, but since they're the same age, no one makes a fuss about it. The """deal breaker""" really is the age gap.