Responses
that sounds interesting
That escalated quickly
Been a while since I read it so I can’t remember, but is it this?
http://www.mangago.zone/read-manga/yuusha_in_maou_n_chi/
No. It might’ve been a manga in a manga. But it was kinda deep.
The demon lord did not age. But the kid did.
So it’s a yaoi. This guy starts off as a kid going to defeat the demon lord and he keeps going through different stages of his life and then he finally beats him at a certain age and they fuck.