Despite an increasingly hostile world, Ko Dongman and Choi Aera decide not to give up. No matter what others speak of them, they together make their own way to live a happy life.

Ko Dongman (cast: Park Seojun)
Dongman, filled with hopes and dreams, wants to be a national taekwondo athlete at first. But, he has to change his dream for a reason. He decides to become a fighter. Once again, he tries his best. Is it not the right time, yet? Aera, his best female friend, is in the way! He never wants to get involved with her as a man and woman. Despite how he wants things to be, they keep going beyond the 'friend zone'.

Choi Aera (cast: Kim Jiwon)
Aera wants to become a news anchor. But, in reality, she works at an information desk in a department store. Even though it looks like she has nothing special, she is more like a woman who shines by herself, not a woman who shines when standing next to a man. She, however, has one weakness. She's not good at dating. Protecting her man is how she loves. Like this, for 10 years, she's been on Dongman's side.

Kim Juman (cast: An Jaehong)
Juman, a successful food MD, is Dongman's closest friend. Through Dongman, he meets Seolhui. Falling in love with her at first sight, he goes out with her for 6 years. Yet, Juman keeps delaying their marriage because of some practical problems. All those years they spent together can in no way be negligible.

Baek Seolhui (cast: Song Hayun)
Seolhui, working as a TV home shopping network counselor, thinks love is more important than anything else. Secretly dating Juman at work, she loves her boyfriend so much. He's not just a lover to her. He's her life. Well, the love never feels the same through the years. As the years pass, a certain comfort envelops their relationship, providing her with a security that wasn't part of the initial 'love high'.