Madk, Vol. 3 (manga)

FINAL VOLUME!

Makoto has long been ostracized because of his odd hobbies and a sexual kink others see as disgusting. After summoning a demon from hell called Archduke J, Makoto sells his soul to him and is reborn himself as a demon in hell. As he learns and grows in his new role, his infatuation with J turns into an obsession - an obsession to surpass the very demon who birthed him!