Weightlifting Fairy Kim Bok-Joo

Following her father’s footsteps, Bok Joo is an aspiring weightlifter. She bumps into Joon Hyung, an unlucky swimmer, in various strange ways. Bok Joo also becomes roommates with Si Ho, a gymnasts who is also Joon Hyung’s ex-girlfriend. The strange relationship between Joon Hyung and Bok Joo seems to have a long past.

Bok Joo and Joon Hyung remember that they went to elementary school together. The past comes back to haunt Bok Joo. The weightlifting team gets a budget cut, so they have to cut down on food expenses. In order to handle the budget, Coach Choi makes snacks on her own, which leads everyone to have food poisoning.

Bok Joo wants to sign up for the weight loss program due to Jae Yi, but she doesn’t have enough money. In the midst of that, the school’s annual mountain climbing race is held, and the dean even offered a prize money this time. Meanwhile, Si Ho goes through some hardship.

Bok Joo finally starts the weight-loss program, and her secret double life begins. Si Ho wants Joon Hyung back, but he’s adamant. Woon Gi has a secret of his own, which even causes trouble to the team. Meanwhile, Professor Yoon and Coach Choi suggest a weight increase for Bok Joo, which may cause issues to her love life.

Joon Hyung finds out that Bok Joo goes to the weight clinic because she has a crush on his brother, Jae Yi. The struggle for Bok Joo begins from then on. Meanwhile, it’s the day of the track meet at school, and Bok Joo helps Joon Hyung in order to make him stop teasing and tell anyone about her secret.

Joon Hyung’s therapist suggests some solutions in order to overcome his trauma, so Joon Hyung competes at a small match to test it. Meanwhile, Bok Joo lives a double life. She is in a dilemma to gain weight as everyone tries to help her eat more and gain more. Also, Bok Joo finds out about Joon Hyung’s trauma.

Bok Joo gets caught about going to weight clinic and receives a rebuke from her dad, Coach Choi, and Professor Yoon. Joon Hyung comes to know about it and tries to make Bok Joo feel better. Meanwhile, Bok Joo visits J Weight Clinic with a present after she comes to know about Jae Yi’s birthday.

Bok Joo calls Jae Yi and tells him that she won’t be coming to weight clinic as she is going to study abroad. Si Ho tells Joon Hyung about her jealousy towards Bok Joo. Meanwhile, Bok Joo injures her back and visits infirmary while Jae Yi is on his way to meet Ah Young.

After encountering Jae Yi at the university, Bok Joo confesses that she’s actually a weightlifter. In order to lift up Bok Joo’s spirit, Joon Hyung tries hard to be her good companion. With Joon Hyung’s help, Bok Joo manages to control herself and is determined to solely focus on the competition.

Joon Hyung tells Jae Yi that the one Bok Joo had a crush on was Jae Yi and how he made a mistake to hurt her feelings. Due to his guilty feelings, Jae Yi apologizes to Bok Joo which makes her feel worse. Meanwhile, Coach Choi gets fired for using the operation funds for Woon Gi’s settlement money.

Bok Joo is in a slump. She is decided to take a break during the winter. She tries to do everything that she wasn’t able to do because of weightlifting. Meanwhile, Joon Hyung realizes his feelings towards Bok Joo, and he takes a grand gesture to let her know how he feels.

Joon Hyung tries to make Bok Joo’s bucket list come true, and during the process, he surely makes Bok Joo’s heart flutter. While visiting Seon Ok since she cannot return to school due her parents’ opposition, Bok Joo finds out her father has collapsed. Meanwhile, Si Ho suffers from the side effects of sleeping pills.

Si Ho collapses and is taken to the hospital. Despite telling Joon Hyung that she hates jealous types, Bok Joo feels jealous when Joon Hyung acts nice to Si Ho. Meanwhile, the weightlifting puts in efforts to get Coach Choi back, and they go on a hunger strike in the middle of winter.

Bok Joo and Joon Hyung keep sneaking around in order to not get caught. However, their relationship is revealed due to a certain incident. Si Ho competes in her last competition, and something unexpected happens. Meanwhile, Joon Hyung’s birth mother shows up.

Joon Hyung finally meets his birth mother and feels happy. However, he soon finds out that she came to borrow money rather than to meet him. Heartbroken Joon Hyung runs away and goes missing. Meanwhile, Bok Joo is called to Taereung as she makes it to the national team.

Bok Joo is about to participate in her first international competition. All worried, Bok Joo’s dad hides the fact that he’s about to have his surgery from her. After discovering that, Joon Hyung also tries to hide that from Bok Joo, but backfires after garnering suspicion from Bok Joo.