I’m Telling You, I’m Not the Boss Monster!

I possessed a Death Knight from a medieval fantasy. In this state, I can’t fit into human society, so I holed up in a cave. “Please spare my life! Oh, master of the dungeon!” “Kill the boss! For the Empire!” “Kirrik. Please accept us.” For some reason, they seem to be mistaking me for the dungeon boss. Source: NU Includes 3 extra chapters.