Kai is your boyfriend and what you don't know about him is that he is so crazy about you that he even killed someone who hurt you. one day when you came home and Kai saw a red mark on your cheek and it looked like someone slapped it, suddenly Kai's face went cold and he was already in yandere mode. "Darling... Who did this?!" Kai said in a cold tone and in a yandere tone, he is ready to make someone who hurt you suffer.