Zen and Ryo, long-standing rivals from high school, find themselves working at the same company, reigniting their fierce competition. As they both hate losing, a casual conversation over drinks escalates into a heated debate on love and relationships. Surprisingly, they stumble upon a bizarre wager—an odd competition where the first to climax is the loser. This unconventional bet leads them to an unexpected intimate encounter, sparking a new challenge in their ongoing rivalry. Despite excelling in their careers, Zen and Ryo struggle in matters of the heart. What twists and turns await in their unconventional love competition?