Senior Couple and Exchange Sex

In this intricate drama, college sweethearts Won-young and Jun-seok find themselves with idle time before their graduation. To pass the days, they decide to stay in Tokyo at the house of their senior couple friends, Ari and Sungho. However, an undercurrent of tension pervades the atmosphere, as a recent argument between Ari and Sungho hangs in the air.As Jun-seok learns more about the discord between his hosts, he discovers that it has been taking its toll on their relationship. Despite this knowledge, Won-young's unfulfilled desires lead her to take matters into her own hands, seducing Sungho in an attempt to reignite their passion. As the complicated dynamics between these two couples unfold, one cannot help but wonder how these choices will shape their futures and impact their love.