Seok Ji-Won wants to end the bet with Yoon Ji-Won when the lilac withers in Love Your Enemy: Episode 8. She’s sad to shed tears. But he confesses his feelings to her. The couple get together after so many years. The next day, he begins to pack his stuff and leave the dormitory.
Yoon Ji-Won doesn’t come out to say goodbye to Seok Ji-Won. Jae-Ho and Moon-Soo mistake that the two had a fight. Yoon Ji-Won doesn’t have dinner. She goes to the playground to run. Jae-Ho and Moon-Soo don’t know the girl went to date Seok Ji-Won.
The two hold each other’s hands going to the furniture store. They buy the furniture for Seok Ji-Won’s new house. Seok Ji-Won holds Yoon Ji-Won’s hand. He doesn’t want to leave her. She blushes. They return to the school. He invites her to have lunch. He prepares the top sushi set for her.
But Moon-Soo invites Yoon Ji-Won to go to watch movie. She chooses to eat cutlet with him for explaining the two’s relationship. Seok Ji-Won knows Yoon Ji-Won has an appointment. He sees the two off. He’s in jealousy. Yoon Ji-Won decides to confess it to Moon-Soo about her and Seok Ji-Won’s relationship after the lunch.
She’s interrupted by Duk-Soo before she speaks out. The teacher mistakes that she’s confessing to Moon-Soo. He thinks the two want to date secretly no matter how they explain it. He misses the happy hour of him and his wife. He’s shy to leave.
Duk-Soo’s gossip flame is burning in his heart. He tells the secret to Jae-Gyu. Jae-Gyu leaks it then. Everyone knows Yoon Ji-Won is dating Moon-Soo. Seok Ji-Won cannot reach Yoon Ji-Won. He’s angry to return home. He sees her lover sitting on the couch asleep.
His anger is gone. He’s happy to lean on her shoulder. She wakes up. He tries to kiss her. She’s shy to avoid him. She thinks it’s weird that she kisses her enemy.
The next day, Seok Ji-Won overhears that Yoon Ji-Won is dating Moon-Soo. He gets angry after knowing Yoon Ji-Won did two-timing. It’s embarrassed that Yoon Ji-Won and Moon-Soo wear same clothes. Yoon Ji-Won zips it up for Moon-Soo. The students think the two wear couples’ clothes. Seok Ji-Won glares at Yoon Ji-Won.
She explains it to him that everything was a misunderstanding. But he wonders why his girlfriend zipped it up for Moon-Soo. He asks her not to wear the clothes. He goes to her house to take the luggage. Jae-Ho keeps Seok Ji-Won for dinner.
Yoon Ji-Won and Moon-Soo talk about the symposium. Seok Ji-Won is told that the two will go to drink after the meeting. Moon-Soo plans to do something big. Seok Ji-Won isn’t calm when he puts the rice into his mouth. He cannot sleep so that he calls his follower.
The next day, the teachers wait for the bus on the campus. But many cars come to the school. Seok Ji-Won gets off the car. He informs the teachers that he changed the meeting place to his resort. He plans to take a ride with Yoon Ji-Won.
But Duk-Soo puts Yoon Ji-Won and Moon-Soo into a car. He takes a ride with Seok Ji-Won then. Seok Ji-Won has to accept it. The people arrive at the resort. They go to the cafeteria. Seok Ji-Won intends to sit with Yoon Ji-Won. But Young-Jae invites him to sit with her. He sees Moon-Soo sitting with Yoon Ji-Won.
Young-Jae asks Moon-Soo and Yoon Ji-Won to sing a love song together. But Seok Ji-Won grabs the microphone from Yoon Ji-Won. He sings the theme song of “Palace” with Moon-Soo. He stares at Yoon Ji-Won when he sings. He confesses his feelings to her through the song. He blocks Moon-Soo when the guy tries to approach his girlfriend.
Ji-Hye is unhappy to go to the beach alone when everybody is having fun. Seok Ji-Won runs into her. He supports her when she’s swept away by the sea wave. The two sit on the beach having a talk. Ji-Hye tries to confess it to Seok Ji-Won that she was the one who blocked his number. It made Seok Ji-Won and Yoon Ji-Won misunderstand each other.
He stops her from talking. Because he thinks she should explain it to Yoon Ji-Won. She’s conflicted. She likes Yoon Ji-Won but she hates her at the same time. She thinks the resentment comes from her jealousy. She feared to tell the truth to Yoon Ji-Won before. But she decides to confess this time.
Ji-Hye’s shoes were washed away by sea wave. Seok Ji-Won leaves his shoes to her. She looks at the gentle him. She remembers she was attracted to him when he was basking in the sun. But he looked at Yoon Ji-Won who had fun downstairs.
Meanwhile, Yoon Ji-Won tries to contact Seok Ji-Won. But Young-Jae catches Yoon Ji-Won. She tries to take her to go back to sing. Fortunately, Moon-Soo shows up. He holds Yoon Ji-Won’s hand. He asks Young-Jae for some space. Young-Jae tells the two to go to date.
Moon-Soo leaves after he helped Yoon Ji-Won. She returns to her room and she hears the stone hitting the glass. She goes to the balcony. She sees Seok Ji-Won waving at her downstairs. She rushes into his arms. They hold each other’s hands trying to date. But they run into the colleagues who walk to them.
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They go to the room to date. Ji-Hye sees it when she tries to return the shoes to Seok Ji-Won. She’s sad to leave. Seok Ji-Won kisses his lover after he got into the room. They enjoy the romantic couple’s world. But Gyeong-Tae comes to the resort. He runs into Ji-Hye in the lobby.
She volunteers to show him the way after knowing he wants to go to his son’s room. They reach the room. Gyeong-Tae lets the manager open the door. Yoon Ji-Won and Seok Ji-Won hear the sound. They look at the door.