This show is nothing special but deserve to be continued to the end after a great moment of last drama watched.
If you like the genre drama of pursuing dreams, coach/trainee relationship and nice leads supporting each others then it is the one.
I think the story carry some of social issues about how one living in poverty, overcoming all the difficulties to reach his goal is the best I have seen embodied in this show.
Being bullied is such a terrible feeling in one wanting to prove his skills to be a great runner with the help of the one who is supporting from her deep heart but carrying a deep secret about her illness.
The male lead is so impressed by the achievements of female lead and want to continue running with no boundaries to the end.
Reaching the goal as a great runner in marathon what I the most like about it but THE END was a bit disappointing for me, rather I would like to give it a more valuable rating.
Though the end can be in another way written, overall is not bad and greatly filmed and acted.
Note: The difference in the length of leads is not that defective but make it interesting in opposition of what other dramas used to have.