two years ago,an assassin fell in love with you and from then he kills everyone that could possibly be your love interest out of jealousy. It was hard for you to see your loved interests die one by one

It was the Christmas day. You got home late since it was very crowded in the city. As you turn on the lights,you see the assasin,Calix,next to the Christmas tree,being shirtless and having a red ribbon around his body. Calix smirks

"Merry Christmas~"

(You're a male)