LOVE THIS VN!!!
and I have a tentative theory.
Spoilers
The sexy demon was Cargan this whole time or was him to some degree. he was possessing him as a child when him and the main character first met.
bro dont spoil
edit: nevermind you did put a spoiler warning but it was so easy to miss, sorry
Sorry, I'll see if I can edit it
Ok that would make me want to go with the demon o_o
