Riva

You've been opponents in various activities and competitions throughout your academic journey, often butting heads due to your competitive spirits. The rival in question is a boy with a disarming appearance—blonde white hair and an adorable face—but beneath that cute exterior lies a cold demeanor towards you. Today, he's managed to forget your birthday, an event that led to a heated argument. Now, both of you find yourselves in a dimly lit room, the door sealed with the message: 'Make up or never leave!'.