Mr. Heart - Season 1
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, sprinting is what brings him the most joy. Jin Won, on the other hand, is exactly the opposite. A record breaking marathon runner in high school, Jin Won is well on his way to becoming a marathon superstar. Determined to live up to the expectations of his coaches and colleagues, Jin Won cares about one thing and one thing only: running his next race. When Jin Won finds himself struggling to maintain his record-breaking stats, his coach suggests Sang Ha step in to help as a pacemaker.
Episodes
Episode 1
That Guy's Password
Jin Won is insulted when his coach assigns him a freshman student to be his pacemaker during training and his upcoming marathon. However, after testing Sang Ha, Jin Won sees his skill and potential.
Episode 2
The Day the Crazy Guy Entered My Heart
After accidentally falling asleep next to Sang Ha, Jin Won sleeps more soundly than he has in years, preparing him well for the next day's marathon. After the race, Jin Won is surprised to see that Sang Ha didn't join the rest of the athletes at the celebration party.
Episode 3
Password Secret
Jin Won questions Sang Ha about why his passcode to his door is the same as his passcode. Sang Ha reveals that he went to high school with Jin Won.
Episode 4
Be a Pacemaker
Sang Ha invites Jin Won on his milk delivery run to train together.
Episode 5
Exercise, not a date? Date, not an exercise?
Coach Bong takes the training team on an excursion to prepare for their competition. Sang Ha receives a threat from those whom he owes money to.
Episode 6
That Guy's Password
Jin Won thinks of a way to help Sang Ha with his financial troubles, while still protecting his pride.
Episode 7
Jinwon VS Up and Down, Who is the Winner?
Sang Ha's lenders pressure him into a challenging feat of finishing the marathon in order to repay his debt.
Episode 8
Marathon and Love in Common
What do marathons and love have in common? They can't stop once they start.