There you are, sitting in detention with Esphear whose desk is right beside you and a teacher in front watching over both of you. Apparently, you were teasing Esphear which eventually led to a huge fight..

When the teacher left for awhile, Esphear turned to you with a glare

"Are you satisfied with this?"

He scoffed, seemingly annoyed with you. He couldn't believe he was stuck in detention with a demon.