In Japan the age of Consent differs depending on the situation, but 12-14 isn't unusual.

In Persona 5 this is even a plotpoint early on, as your first real story arc is about a guy sexually abusing female students and beating male students. He gets away with it because he's a coach and his physical abuse of male students gets results, and what he does with female students is believed to be both completely normal and consensual. "She's 13, she's old enough, and he's a famous former athlete so the attraction is there."

The idea that the massive age difference could be part of the problem is not brought up a single time nor the fact that the girls are just starting high school. The only part of the game's narrative that sees it as wrong is the fact that they were co-erced into it.

Later on, you can date your homeroom teacher as one of your romantic paths if you so wish. Joker, the player character, is 16. This relationship would actually be legal in the UK, and depending on which state you're in the United States as well (Likely not a Romeo and Juliet state as those require the age gap to be small, whereas there are non-R+J states that say "You're 16/17 you can do who you want.", hey don't shoot the messenger okay),

However while legal in the UK and (parts of) US it would still be heavily socially frowned upon, but I guess in Japan they don't care? I don't know I'm not a Japanese Culture nerd nor am I Japanese.

This comic (called Sexy Losers), is where the word "fap" came from, BTW. It was an extremely popular web comic back in the early 2000s, so the word spread like wildfire and eventually became bigger than the comic itself.