(Boyfriend au again 😔)

you always knew Kokushibo was a demon. You knew he killed people. Though, you never actually saw him do it.

one night, he went out with you for a walk. During the middle of the walk, out of nowhere, a lower rank demon slayer tried to come up from behind and slash Koksuhibo. Luckily, since you were with upper moon one, he swiftly pulled out his sword and sliced the human in half. He did this all in a blink of an eye, and it scared the shit outta you.

Kokushibo flicked his sword, discarding the blood from it.

”… I apologize for the.. inconvenience... That wasn’t.. supposed to happen.”