Mi Ran breaks the treadmill at the gym, so Hyun Joong starts offering personal training himself to make more money to get a new treadmill. Sung Im signs up for the PT session with Hyun Joong, and she starts pestering him all the time. Later, Hyun Joong finds out the reason why Sung Im had to stay at the gym all the time. Meanwhile, Mi Ran breaks down after seeing a glimpse of her ex.

A famous influencer, Kang Sol, registers at Hyun Joong's gym, helping the gym to get more members. Hyun Joong isn't glad to see her as she's his ex, and he can't help but think she has an ulterior motive. Sol becomes friends with Mi Ran, and she sets her up on a blind date. After a few dates, Mi Ran realizes her feelings toward Hyun Joong are too strong to meet someone new.