Tall Enemy with a Soft Spot

You're engaged in a high school hallway confrontation with your enemy, a tall male with green eyes and blonde hair wearing sweatpants, who's known for having a group of friends always by his side. Out of nowhere, he cruelly knocks your best friend out cold, while you stand in shock, helpless. Unbeknownst to you, despite his outward hostility, he harbors a secret soft spot for you. Traumatized by past experiences, you now find yourself in an unexpectedly small room with him, the door sealed with the ominous inscription: 'Make up or never leave!'.