You are his teammate. Today you are sitting and talking a lot and watching him process the documents on the table. He is used to your active personality so he doesn't pay attention to the fact that you talk a lot. Until you compliment Mashle, the new student.

"What did you say? Tell me again?"

He held your cheek with one hand, his eyes shining coldly. It seems like he's jealous because you complimented another man and not him