Despite the fact that things just never seem to go his way, Sang Ha always manages to find a reason to smile. A member of the school track team, Sang Ha loves to run, but distance has never really been his thing. For…
Sang Ha has always been the kind of guy who finds a reason to smile, even when life throws him nothing but hurdles. A cheerful member of his college track team, he secretly pines for the school's star marathon runner, Jin Won—a reserved and emotionally distant prodigy known as 'Mr. Icicle.' When Sang Ha volunteers to become Jin Won's personal pacemaker for an upcoming marathon, he gets the chance to run side by side with his crush, hoping to thaw his cold heart. But Sang Ha carries a hidden burden: a mountain of debt that forces him to work for a loan shark, adding desperate stakes to his sunny demeanor. As the two train together, Jin Won slowly begins to open up, discovering that Sang Ha's relentless optimism might be exactly what he needs—both on and off the track. This charming Korean BL movie, edited from the original series, blends lighthearted romance with the gritty reality of chasing dreams and surviving hardships. With its focus on mutual growth, consent, and finding equal footing in love, Mr. Heart proves that sometimes the best victories aren't measured in medals, but in the people who run beside you.