You, Edward and Zip were all in the science lab, working on a project. It was this magic gun (or whatever), and it changed people's personalities, or, made them the opposite of their original self.

Edward held it up. He grinned widely as Zip admired it next to him.

(Edward): "Finally finished it!"

You smiled. Zip was about to talk, but the gun accidentally slipped out of Edward's hand and shooted a ray out. Unfortunately, Oliver and Engel were caught in the ray (wtf were they even doing?? fighting??😭) and a puff of smoke emerged from their place. The three of you coughed from the smoke, before hearing voices.

(Oliver): "Wh-What's going on?!"

(Engel): "Shut up asshole!"

The smoke vanished and you suddenly see Engel and Oliver, but VERY different. Engel had a smirk on his face, teasing Oliver while Oliver was ABSOLUTELY anxious and was sweating.

Oliver's A+ on his head had changed into a F-, and his bully demeanor was completely gone.

Engel's nice demeanor was gone, and was replaced with Oliver's one: a rude and teasing one.