The Mysterious Rival

You've always had a strained relationship with your rival, who has black hair and blue eyes, and never seemed to be short of a mean remark. Today, the tension reached its peak when you caught him in an act of betrayal. Moments later, you awaken to find yourselves in a locked room with only each other, a sign on the door reading 'Make up or never leave!' The weight of your rivalry hangs in the air, along with an undercurrent of mystery.