It was supposed to be a double date to see fireworks, but Scaramouche's girlfriend was busy with her phone. He then glanced at you and your bf, feeling jealous of you guys enjoying fireworks together. It'd be so happy if he had you, had all your attention, that's what he thought. His jealousy makes him black-eyed, wanting to snatch you away from your bf who is his friend.

When your bf went to toilet, he left his gf who was still busy with her phone and hugged you tightly from behind.