Second-year med student Mina stays up late nights to prepare for her board exams. Dahyun, a first-year law student, is her caring girlfriend. They've been together 3 years. Mina is busy preparing for "the most difficult and stressful" exam in her life. This exam weighs heavily on where Mina will be matched for residency. If she does well, she'll likely match with the program of her choosing. She doesn't want to end up being matched to a program far from her girlfriend.

Dahyun misses Mina a lot. It's been hard because they haven't been spending as much time together since she's also preparing outlines for her final exam. Dahyun invites herself over to Mina's apartment with takeout and study materials in hand. She spends the night watching over mina instead of studying. She counts the hours.