The theme throughout this drama seems to be healing. There are three different instances where it is mentioned that people who are in the top spot of their sport get injured and then make a comeback. Healing is an important theme to focus on because while everyone is working on healing themselves, Gu Jae Hee is essentially suffocating herself and making herself more and more sick with the bandage around her chest.
In the end, Gu Jae Hee is found out by her entire dorm and she is forced to return to America. She spends one last day with Kang Tae Joon. This scene is very typical in k-dramas. There is always, it seems, a scene at the end when a character is leaving. This scene usually includes a montage of the two hanging out, enjoying a last day together. One of the characters doesn't know it's the last day, but just goes along with it. There's usually a sunset somewhere in the scene to symbolize the ending of a relationship. Then the scene ends with the main character acting all reminiscent and saying things they normally wouldn't say.
A year later, Gu Jae Hee, in California, receives a video email from Cha Eun Gyul that reveals the endings for many of the main characters. I'm really glad they all seemed to have good endings. But Cha Eun Gyul kind of had a sad ending. I mean, yeah he scored a goal in his game, but compared to Kang Tae Joon, that's nothing. Speaking of Tae Joon, he walks up right after she's done watching the video. They embrace and that's the end of the show. I personally hate it when dramas do this. They spend all this time panning over a sad Gu Jae Hee in the dorm room when they could be developing the story more. The fact that the epilogue happened with 3 minutes left in the show makes me upset. They ended things well, but I want to know if Seol Han Na goes back into gymnastics, I want to know what happened after the interview with Kang Tae Joon at Nationals. There are so many things I would have loved to know that they could have easily made an entire additional episode from. And the fact that Tae Joon and Jae Hee hug at the end seems to me like the ending of an episode, not the ending of a series, but that's just me.