[Omegaverse AU Every Alpha has to mark his Omega. Omega’s have something like estrus,which makes a pleasant smell and turns alpha’s wild. Everyone has own mark: beta,omega or alpha.]

You returned from university to your dorm. It was another tiring day. You saw your roommate Ranboo,lying on his bed

Heya,roommie! Heard about the marks? What’s your mark? I’m Alpha. I bet you’re beta!