Ko Dong-man, Choi Ae-ra, Baek Sul-hee and Kim Joo-man weren't the best students in high school -- and find themselves having to compromise as adults.

Ae-ra goes after a thief at the department store but ends up risking her job. Sul-hee is upset that Joo-man isn't being honest about things at work.

Ae-ra does a favor for an old classmate at a wedding but things get out of hand. Dong-man visits his parents, who bring up a touchy topic.

When he sees how happy Ae-ra is after grabbing a new opportunity at work, Dong-man thinks about what it means to follow one's dream.

Dong-man regrets going to the match but ends up making a drastic decision. Ae-ra takes a tentative step toward trying to pursue what she wants to do.

Fearing for his life, Ae-ra tries to stop Dong-man from entering the competition. Sul-hee and Joo-man decide to start fresh -- apart.

Ae-ra receives two callbacks and faces a choice. Dong-man's big day draws near and he is ready to fight. Kim Tak-su has something else in mind.

Joo-man stands up for Sul-hee, who goes to a family function by herself. Dong-man tells Park Hye-ran how he truly feels about her.

When Joo-man doesn't come home, Sul-hee reveals that she has a dream of her own like the rest of them. Dong-man notices something about his father.

Unable to let go of his memories with Sul-hee, Joo-man asks for a second chance. Dong-man's injury forces Ae-ra to give him an ultimatum.

Dong-man struggles with his feelings. Ae-ra decides to give Park Mu-bin a chance and sees another side of him. Sul-hee overhears something at work.

Dong-man and Ae-ra try to figure out what happened the night before when her father showed up. Sul-hee and Joo-man go to visit her parents.

Dong-man and Ae-ra go on an official date. An unwelcome new neighbor moves into the villa. Ae-ra's interest in a new job prospect perplexes Sul-hee.

Sul-hee's new business takes off. On the day of the rematch, Dong-man asks Ae-ra a life-changing question.

After his debut match, Dong-man surprises his family and friends. Ae-ra has another interview and runs into Hye-ran. Joo-man finally reveals the truth.

Things between Ae-ra and Dong-man remain awkward. Sul-hee tries to tell people at work about her relationship with Joo-man, but it doesn't go well.