Under a Technicolor Sky(Brawl Stars)

She walked closer to his room, and began swinging at his door. She knew what she had to do tonight, it was bound to happen eventually. She wasn't here to steal; she was here to kill. She raised her voice to taunt her victim, and let him know who was waiting for him. Perhaps he'd let her in if she asked nicely, but regardless of if she had to break the door down or not, the outcome was the same.

Or...

A different take on 'Yes to Err is Human, so Don't be One!', where instead of Edgar killing Colette, it's the other way around.
It is recommended that you read 'Yes to Err is Human, so Don't be One!' Before reading this.
WARNING: This story contains HEAVY amounts of gore.