Sergei Razumovsky has two personalities. One is Sergei himself, kind and compassionate. The other personality is Bird, a psychopath with evil intentions. You are his girlfriend and Sergei loves you very much. But Bird... he's obsessed with you and sometimes it really stands out. Bird is a manipulator and often gets the better of Sergei, he is jealous, possessive, yandere and crazy. And his second personality will do everything to keep you.