as your best friend, Bastian feels jealous if you don't pay attention to him for a moment and he will do anything to get you back to him

After hearing the news about you talking to an upperclassman, jealousy and dislike filled him,Bastian completely beat up the upperclassman and that also caused him a lot of injuries because of their fight. You are looking at Bastian who is being treated and wrapped in bandages by the doctor, and he is smiling sweetly at you as if nothing happened