Joon-hyung goes to the hospital to see Chang-gul, who asks him to hide the operation from Bok-joo so she can focus on her training.
Joon-hyung is reunited with his mother. The next day he goes back home to retrieve some childhood photos and overhears something that shocks him.
Love is in the air as another secret relationship comes out into the open. Bok-joo is nervous after Nan-hee's stern warning to her friends.
Joon-hyung and Bok-joo are now a couple after letting each other know how they feel. Joon-hyung doesn't notice a call from Shi-ho.
Bok-joo is taken aback at the sight of Shi-ho stuffing her face but keeps it from Joon-hyung. Joon-hyung invites Bok-joo to an amusement park.
After Bok-joo's disappearance in the aftermath of Coach Choi's firing, she shows up and tells her father she wants to quit weightlifting.
Joon-hyung criticizes Jae-yi after he shows up at a weightlifting competition to cheer Bok-joo on, not knowing she doesn't want to be seen like that.
Jae-yi sees Bok-joo while he is at the university. Joon-hyung tries to cover for her, but Bok-joo confesses to Jae-yi that she is a weightlifter.
Shi-ho snatches Bok-joo's phone away while she is speaking with Joon-hyung. Bok-joo sleeps in a different room after finding out about the diary.
Bok-joo's coach and manager find out she is going to a weight loss clinic and tell her father, who is furious. Bok-joo tries to apologize.
Bok-joo is delighted to get a ride from Jae-yi after the concert. While Joon-hyung is in counseling he recalls an incident from his childhood.
Joon-hyung runs into Bok-joo when he visits Jae-yi at the clinic. Bok-joo hides the truth from Jae-yi and explains that they are just old classmates.
Bok-joo pays the clinic fees and gets an examination, but is warned not to overdo it. Bok-joo wants to thank Jae-yi for lending her his umbrella.
Bok-joo visits Jae-yi's weight loss clinic but worries about the price. She then hears about a mountain climbing contest with a big prize.
After Joon-hyung saves Bok-joo when she falls into the pool, they realize they were friends in childhood. Joon-hyung comments on Bok-joo's weight.
One day Bok-joo, the star of the weightlifting club at her sports university, runs into Joon-hyung, a swimmer who is weak under pressure.
