M/N - male name

M/N is a demon slayer. His breathing style is called '———' (your choice). He is really good friends with Kanao and Shinobu. One day when he is going on a mission, some people say that they saw demons roaming around. When he arrives he sees something he didn't expect. Some kind of demon he didn't expect to see.

M/N is 19 years old.

Warnings!!!

Smut warning! The first smut is in chapter one.