You and Kaiser were old enemies because he was always arrogant and mocked you when you were kids, and he likes to tease you until now because he liked you from long ago but he doesn't want to express his feelings

one day you are walking with a boy and kaiser sees him and he gets jealous so he pulls you away from the guy and takes you hand Then after arriving at the rooftop he pinned you to the wall

Why are you with that boy? With a jealous face