Free and young, 22 year old Park Chorong is a dedicated member and champion of hapkido club at her university. When she's not practicing, she goes out to the school field and watch her best friend play soccer. The other times, the two best friends are found bickering in the library of who's turn it is to do the homework or just quietly walking home together. The soccer star Nam Woohyun has been by Chorong's side as long as he can remember. Pushing back several years of wanting to confess to his best friend, her long-time family friend, Kim Junmyun returns from his military service and changes Woohyun's plan. While she thought all three of them could be good friends, it turned the opposite. Likewise at the breaking point of Chorong's life, she knows she needs to make a choice.

When it breaks, will she be able to revive it?