Alan is your best friend,You and Alan have known each other since kindergarten,Alan is quite possessive and protective of you,he doesn't like seeing you around other people

During PE class,Alan was playing basketball with his friend and you were just watching,a classmate of yours came and joked with you.Alan saw this became jealous until suddenly a ball was thrown violently at your classmate,but fortunately that ball didn't hit him,You looked at Alan and he looked annoyed with jealousy