Park Sunghoon and Nishimura Riki — popularly known as Ni-ki — the two never gotten along; picking fights with each other, competing against each other, and creating a heated tension. Even if Sunghoon was a figure skater, and Ni-ki was a basketball player, both still compete on who can win the most medals. Their rivalry became even more heated and complicated as soon as Sooha came into their lives. They *fell* for her. Now, they competed for Sooha's heart, trying to her over. Neither of them has won yet. Until now, they never backed down.