Dimitri's age is 19, but it says you mistakenly thought he was older than your age of 17, which doesn't make any sense. How old is the playable character supposed to be? (and why does she have a set age when we can customise her? I'm not sure giving the MC and dateable characters ages is that wise as it can kind of restrict the players options/if they want to play, imo)
Wait, never mind, I get it now though it's still a bit confusing, my second point still stands though :P

Giving the player the ability to customize the MC's age messes around with a lot of things story-wise, so the player does not have this option. For example, the story would play out a lot differently if you were playing as a 40 year old MC, instead of a 23 year old.

I also cannot think of a single otome game where you're allowed to customize age (just that they don't mention age at all). Either way; it's not worth it unless it's a 100% customizable RPG-like game, which Tailor Tales is not.