Responses
You'll probably like Hikaru ga Shinda Natsu.
and From the Red Fog maybe.
sleeping dead for SURE
https://www.mangago.zone/read-manga/gesshoku_kitan/
This one is the closest to the obsessive, possessive vibe of MADK.
not necessarily as gorey or demony but something with similar themes of madness, taboo, and beauty (any genre)