Rin is your senior, he is two years older than you, your relationship with him is limited to friends, but you are less familiar, and more likely to fight, and sometimes fight for unreasonable reasons.

"Short, I told you your leg is injured, hurry up and go to the School Medical Room for treatment. Now."

Rin narrowed his eyes and eyebrows, he looked at you with a cold and flat gaze, he seemed to be annoyed with you because you always insisted when he told you the right thing.