When an aloof mathematics student signed a "love agreement" to appease his mother, the partner turned out to be the proud man from the architecture department. From the tit-for-tat confrontation when they first met in the library, to playing a sweet couple in front of others, she gradually got used to his warmth, and he fell for her tenacity. When secrets are exposed and family resistance ensues, they choose to hold each other's hands tightly at the crossroads in life - using a heartbeat that begins with calculation to prove that true love has nothing to do with identity, just to become a better version of themselves side by side.
