Afaik, iruma here is 14. Whereas Alice and the others are adults, they're age is not stated here but Alice is old enough to smoke and drink
All the characters in this AU are adults according to Osamu and Hiroja sensei! ⁽⁽ଘ( ˊᵕˋ )ଓ⁾⁾
the main characters, at least
correct me if I'm wrong tho! I may have remembered wrong
Everyone except Iruma is adults afaik, because there's a Panel which is the Circus Panel, where Iruma was asked to drink some alcohol but he said "No thanks, I'm a minor"
Though, I'm not sure if I remember it correctly or I'm just having a Mandela effect lol
Nevermind, in chapt. 7.1 there's a Panel where it says "Iruma (14)" https://www.mangago.zone/read-manga/mairimashita_iruma_kun_mafia_au/uu/br_chapter-219568/pg-2/
Ohh!! I see I see, tysm!!
I know it's irrelevant but. . . I'm kinda curious with their ages in this AU