Uhmmm guys I'm just now realizing but the skull the demon king wears looks a lot like what the MCs dragon forms skull would look like even down the the horns shape and color 
didn't they mention earlier that MC is the last black dragon and that they are rare?
didn't they mention earlier that MC is the last black dragon and that they are rare? Boo Bit****!
I'm definitely not addicted to Yaoi
WE ARE ALL GAYYYY ✨💅
BL recommendations:
https://mangabuddy.com/manga-list/172617
Spoiler!
I might be a little insane sooo just ignore me...