It is a Manga that I read like 2 or 3 years ago. Was about a bodyguard Kou (I think is his nickname) that need to protect a pink double Pony tailed girl with a rabbit teddy, also she is a relative of the school's principal. One day she fall in love at first sight and tress pass to his house with her bodyguard and he find out something suspicious about him. The plot twist is that the man is actually a serial killer and the bodyguard killed him (?) Every man that she fall in love are serial killers. I don't know if u guys understand what I just wrote.
How's that the end!!! I was hyping this. There was so much potencial and so many plot to see. I was excited to see the first perspective of the omegaverse and how the different traits affect their life's. Aka: how they know alphas means they are tops, how omega pregnancy work ahhhhhhh