Eun-young, who is lonely with no lover, is Hyojin, a studio junior. When you hear that you have a lover, ask for an introduction. Hyojin introduces her lover Kyuhyun to Eunyoung on the way to work. Kyuhyun is a lover who broke up three years ago. Kyuhyun secretly begs Eunyoung to come back to Hyojin, but Eun-young is married. We meet again with Kyuhyun's endless courtship. Hyojin gets caught. Eun-young, who sees the scene of her husband's cheating, goes to Kyu-hyun..