I decided to watch this on a whim because the episodes were short enough for me to binge this for an evening. And, boy, was it disappointing.

The series started off with an interesting premise - Won, a renowned athlete, loses his drive for running marathons and he finds it through a junior of his, who is a literal sunshine. Oh, wait, he manages to do so in the first episode. Huh... Okay, well, at least we have that same junior, Sang Ha, who had been adoring his hyung ever since he saw him running for the first time in high-school, aaaaand... what's his character arc again?

Well, if you're looking for any character development from these two, forget it. Instead, be prepared for a plethora of completely disconnected plot points whose whole goal is to add the unnecessary drama and odd backstory elements, which are sprung out of nowhere and sometimes even seem to contradict the characters' behaviours. Sang Ha has a whole "my-parent-dies-so-I-must-pay-their-debt" subplot, which I'm not mad at, but it's executed so badly that I cringed the entire time. The bad guys literally abused him before crying tears of happiness for him in the end and wishing him well in life. What the actual fuck? There just wasn't enough time to integrate such a heavy topic in a well manner, and it showed. Won, on the other hand, for being such a smart person and knowing not to enter a hot pool before taking a cold shower, has literally zero sense about why Sang Ha didn't buy new shoes even though Sang Ha spelled out his debt situation to him.

The fluff was cute, and I enjoyed their moments of closeness, but they were completely shadowed by the horrible dynamic between the two. Won is such a toxic person who always yells to Sang Ha's face for literally every single thing the guy does. Not to mention that, when they matched again after being separated for a while, his first instinct was to punch Sang Ha in the face! WHY?! I DESPISE any kind of toxicity, and I could not forgive this. Sang Ha is not better either. In the middle of explaining what happened to him, he decides to emotionally manipulate Won by sprinkling suicidal tendencies while telling him how his happiness and only purpose in his life is to be Won's pacemaker. I was thoroughly disgusted, which, in the end, left me saddened since I very much like the cast, and the actors did a great job portraying the actually romantic stuff in this "romance" series.

Finally, when they got together in the end, I prayed they wouldn't start running on their date. And guess what happened? THEY DID. ON THEIR DATE. IN SHIRTS AND PANTS. I feel so bad for the actors that this will be permanently in their catalogue.

At least the OST was perfect.

Overall - Save yourself time and don't watch it, unless you are a romance writer who wants to learn how to avoid writing toxic relationships & corny endings.