Jeong Ha Yoon (Lee Eun Bi) faces heartbreak when her boyfriend Nam Tae Ryeong (Cha Hun) wants to end their relationship before reaching their 100th day. Refusing to give up, she proposes a month-long "break-up grace period" where they can spend time apart without officially breaking up. They draw up a contract with these terms, and while Tae Ryeong goes about his life, Ha Yoon unexpectedly becomes closer to her best friend Han Kang Jin (Kim Jin Woo). As the month progresses, Tae Ryeong begins to feel jealous and uncertain about letting Ha Yoon go. His growing feelings challenge their original agreement and make him reconsider their relationship. Will Tae Ryeong fight to keep Ha Yoon, or will they drift apart during their break? This is a 2023 South Korean romantic comedy directed by Han Sang Duk.