Jin Yuha, an Omega, secretly harbors feelings for his Alpha boss, Sewon. Despite his unrequited love, Yuha diligently plans Sewon's engagement party to another Omega. However, the night before the ceremony, Yuha finds Sewon in rut and provides him relief. This encounter changes Yuha's life, but Sewon leaves overseas. Two years later, Sewon returns and proposes a contract to Yuha: to be his designated heat partner. Yuha is left to wonder if Sewon's intentions are genuine or if he is destined for more heartbreak.
