Story
Yoo Min-hee, who just witnessed her boyfriend cheating on her, returns home crying and runs into her childhood friend Park Hee-min. After seeing Minhee crying, Heemin proposes to Min-hee that the two of them make a love contract…?! These two people were once best friends, but as time passed, they drifted away from each other. What will happen to this love countdown that started?
Synopsis via AniList (English).