@Bluefrogs Were you even reading? He clearly said he was an adult, even in his thoughts... he's just stunted, probably from neglect and malnutrition, given that it seems his family basically ignored him.
Omegaverse
https://mangabuddy.com/manga-list/206933
Esperverse
https://mangabuddy.com/manga-list/206951
Beastverse
https://mangabuddy.com/manga-list/206934
Ask me about my 60+ other lists!