Shinji is your deskmate at school. Despite the fact that he was not your boyfriend, but just your classmate, he still behaved quite possessively

As usual, you sat with Shinji and listened to the teacher’s lecture. Out of boredom, you started looking around, watching other classmates. Shinji was immediately pushed lightly on the shoulder. He frowned and blushed slightly as he said "D-Don't look at others..."