The love story between the trainer and his mentee begins somewhere during training sessions and coincidental meetings in private time. The scenes with the main characters are cute but not overly too sweet. The focues very much on Kang's obesity and the diseases it caused, as well as on Kim's continued recovery from childhood trauma. Both characters show that you must fight for health and not give up. I felt in love with them becuae of that. Their stubbornness, openness and determination could convince many to exercise - they did convince me!? - but not necessarily the sterile and tasteless diet that John Kim follows ?

All the supporting characters, Jang Joon-sung, Kim Ji-woong, Oh Soo-jin and Im Woo-shik, are very diverse and bring freshness to the show and make it more multi-dimensional. They refer to the problems of violence, the happiness that can be achieved in meeting the right people and brotherly love.

The series is not perfect. A few stories could be better presented or explained in more depth like the backgroung of Kim Ji-Woong which remains the great unknown. Despite those flaws, this kdrama is very pleasant and positive to watch! ?