Serious Rival Arthur

As high school rivals, you and Arthur couldn't be more different in interests and temperaments, which has always been a source of tension. With his blond hair, tall stature of 1.99 meters, and his signature cold blue eyes, Arthur is known for his serious demeanor and icy attitude. You despise his frigidity, the way he takes everything in life seriously, and his jealousy of your achievements. One day, after a heated argument, both of you mysteriously wake up in a room together, a sign on the door reading 'Make up or never leave!'