After being dumped by her boyfriend just before their 100-day anniversary, Ha-Young Ha Ji-won meets a college guy named Hyung-Jun Kim Jae-won when she yanks a kicked can away from him, accidentally hits him in the face, and leaves a scratch on his Lexus. He refuses to let her forget the incident and demands immediate payment of $3,000. Flustered and without money, she escapes, leaving behind her wallet and a sense that her problems just escalated.
Hyung-Jun begins to stalk her, insisting that Ha-Young must settle the bill for the car damage. Because she is a poor high school student, he comes up with an unconventional remedy: an “Enslavement Agreement” that makes Ha-Young responsible for a long list of tasks to pay off the debt. What follows is a harrowing stretch where she finds herself performing a string of chores—scouring the house, hauling groceries, and cleaning the car—while her freedom feels increasingly shackled. The arrangement feels like a nightmare, a test of endurance that stretches across a grueling 100-day period.
The situation takes a surprising turn when Ha-Young learns that the actual cost to repair Hyung-Jun’s car is only about ten dollars. Seizing the moment, she directs a subtle, strategic strike: she damages his car again and damages his reputation as well. But Hyung-Jun retaliates in kind by becoming her new tutor, turning the power balance and the dynamic between them on its head. What starts as a punitive arrangement gradually brings them closer, revealing a complicated complexity to their feelings as they realize they may be falling in love.
As the 100 days draw to a close, Hyung-Jun frees Ha-Young from the “slavery.” The moment culminates with a kiss right at the gate of her house, a sign of possibility and risk alike. Ha-Young’s mother witnesses the exchange and reacts with protective hostility, warning Hyung-Jun to stay away while simultaneously bringing in another tutor to guide Ha-Young. In a fragile, wavering emotional arc, Ha-Young declares her wish to marry Hyung-Jun, but he confesses that his earlier actions were not a serious commitment and that he merely toyed with her. This revelation drives Hyung-Jun to leave his apartment, heightening Ha-Young’s vulnerability and pushing her to study harder to reach Hyung-Jun’s college.
After the exams, when Ha-Young discovers she wasn’t initially selected to enter the same college as Hyung-Jun, their tutor gently leads her to a moment of clarity: Hyung-Jun reveals that she has now been admitted to his college, but he wants to surprise her—an ambiguity that keeps their future uncertain. In a long, reflective sequence, Ha-Young drives and talks with Hyung-Jun about all the chores he once dodged and the duties he left unfinished. Then, a late scene shows a high school boy kicking a can that again clips Ha-Young, re-igniting the need to resolve the damages. She hints at a stark choice: there is only one way to settle the debt, implying that she will work for them and shoulder the chores she’s discussed, a final testament to will, resilience, and the messy path toward love.
