1
The Best Revenge
2018-03-12
Soo Ji, Si Hyun, and Se Joo are best friends who have just graduated from high school. Like their crazy personalities, they do not graduate like normal students. They disclose an affair one of the teachers have been having by airing the footages on a big screen during the graduation ceremony. Meanwhile, Soo Ji’s first love, Lee Ki Young, tells her some hurtful words.
2
Surprise Engagement Announcement
2018-03-12
After the graduation, Si Hyun and Se Joo decides to go clubbing while Soo Ji is out with Ki Young. At the club, Si Hyun meets a woman and shares a kiss with her. It is later revealed that Si Hyun has kissed his fellow classmate’s mom. Meanwhile, Soo Ji decides to take revenge on Ki Young and targets Park Hye Jeong and Eun Tae Hee.
3
I’m on Your Side
2018-03-13
Soo Ji's mother and Si Hyun's father make an official announcement about their engagement. Only then, do Soo Ji, Si Hyun, and Se Joo find out about the adults' relationship. Ki Young, Soo Ji's first love, makes snide remarks about the surprise announcement, and Se Joo stands up for her. Meanwhile, the three musketeers try to find a way to stop their parents from getting married.
5
Se Joo’s New Girlfriend
2018-03-19
Si Hyun, Soo Ji, and Se Joo discuss how Si Hyun will seduce Tae Hee. Si Hyun tries to make Tae Hee feel like it is fate by purposely running into her often. In addition, he also tries to win Tae Hee's sympathy. However, Tae Hee does not easily waver. Finally, he gets the chance to eat with her, and they seem to bond. At that moment, Tae Hee tells him she does not want to see his face anymore.
6
How Do You Feel?
2018-03-19
Unintentionally, Si Hyun helps Tae Hee out at a nursing home. Tae Hee sees a soft and generous side to him that she never knew about, and her heart sof-tens. On their way back home, she tells him that she will not date him, and Si Hyun asks if she dislikes him that much. Meanwhile, Si Hyun feels a strange emotion toward Tae Hee.
8
Confession
2018-03-20
Si Hyun tells Soo Ji that he will stop chasing after Tae Hee. Upon hearing this, Soo Ji is frustrated. Meanwhile, Kwon Seok Woo meets Seol Young Won, Tae Hee's mother. They talk about the past and catch up. Amidst all this, Seok Woo's fiancee and Soo Ji's mother, Myung Mi Ri, is suspicious about him.
9
Can Someone Forget That They Kissed Someone?
2018-03-26
Not being able to move into her dorm, Si Hyun gets Tae Hee a place to stay. Furthermore, the place happens to be across his. Tae Hee has no idea that the owner of the building is Si Hyun himself. Meanwhile, Soo Ji senses that Si Hyun may not be simply putting on an act in front of Tae Hee.
11
Why Do You Keep Pretending to Be Bad?
2018-03-27
During the trip, Si Hyun takes Soo Ji's side and acts coldly toward Tae Hee. Tae Hee is surprised to see him act this way since he has always been warm toward her when they were together. Si Hyun apologizes, and the two reconcile. However, Soo Ji finds her and tells her a lie. She lies that Si Hyun and herself are actually in love with each other and that Si Hyun's only acting this way toward Tae Hee in order to hide it.
12
Why Am I Hearing His Voice?
2018-03-27
After hearing what Soo Ji said, Tae Hee is more and more disappointed at Si Hyun. However, she can't help but think about him. On days when he is not around, she misses him. While talking on the phone with her dad, Tae Hee realizes that although she has confessed her feelings to Si Hyun, he has never replied back. Heartbroken, she decides to end their relationship.
13
What Did You Say to Tae Hee?
2018-04-02
Believing that she has been the only one with feelings in their relationship, Tae Hee tells Si Hyun that she wants to end it with him. Si Hyun cannot reply, but he knows that he is falling for her. Broken, Si Hyun gets drunk at a bar, and Soo Ji and Se Joo check up on him. Si Hyun asks Soo Ji what she said to Tae Hee, and she tells him the truth.
14
Let’s Get Married Tomorrow
2018-04-02
Si Hyun confesses his feelings toward Tae Hee, and the two spend the night together at the hospital. The next day, Si Hyun finds out that his credit card is blocked, and Tae Hee pays for his hospital bill. Meanwhile, Seok Woo has trou-ble seeing and goes to the doctor, only to find out that he will go blind in the future.
15
That Isn’t My Mom, Right?
2018-04-03
Soo Ji tells Si Hyun that his dad is seeing some other woman. He demands to know who she is, but Soo Ji does not tell him exactly who she is. Meanwhile, Se Joo and Soo Ji decide to go to a street bar. There, Soo Ji spots Seok Woo and Young Won on a date, having a drink together.
17
I Really Want to Sleep with You
2018-04-09
Si Hyun and Tae Hee go on a trip. There, the two drink makgeolli, a Korean al-coholic beverage, together in broad daylight. Si Hyun is hesitant to try it at first, but Tae Hee urges him. They end up drinking too much, miss the last bus, and decide to spend the night at an old inn. However, Si Hyun doesn't want to go in, and Tae Hee cannot understand why. Meanwhile, Soo Ji realizes that Si Hyun is spending the night out with Tae Hee.
19
Do You Not Like Me Anymore?
2018-04-10
Si Hyun invites Tae Hee to a luxurious place where Soo Ji and Se Joo are waiting. In front of them, Si Hyun acts very coldly toward Tae Hee and even tells her that he is completely different from her. Tae Hee asks him whether he does not like her anymore, and Si Hyun lies. While talking with Soo Ji in private, Si Hyun tells her something she has dreaded to hear.
23
You Started This, But I’ll End It
2018-04-17
On her way to comfort Si Hyun, Soo Ji sees Tae Hee and Si Hyun enter his house. She tells Se Joo that she won’t interfere with her mom and Seok Woo’s marriage anymore. Meanwhile, on his way back from seeing Young Won, Seok Woo gets into a car accident. Young Won calls Si Hyun to come pick Seok Woo up. During their talk, Si Hyun finds out that Young Won’s daughter is Tae Hee.
24
Please Don’t Turn Away from Me
2018-04-17
Soo Ji tells Tae Hee everything about her mother, Seol Young Won. She tells her that Si Hyun’s father is seeing Young Won and that Si Hyun’s mother also died because of her. Si Hyun angrily asks Soo Ji whether Tae Hee knows the truth, and she says yes. Si Hyun looks for Tae Hee, but she is nowhere to be seen.
25
I Decided to Wait for You
2018-04-23
Tae Hee breaks up with Si Hyun and moves out of his building. Si Hyun wants to grab onto her, but since he knows that he has always been the one to hurt her, he decides to wait. Everywhere he goes, he is reminded of her. Meanwhile, Si Hyun tells his grandmother that he is not Seok Woo's biological son, and she tells him not to mention it to anyone until she says so.
29
I Want You to Be in Pain
2018-04-30
Out of revenge for Si Hyun, Se Joo brings Tae Hee to their hideout. There, he shows her videos and evidence of how they decided to target her for their own fun. He tells her that although Si Hyun first agreed to do this in order to please Soo Ji, at one point, he started to actually develop feelings for Tae Hee. Mean-while, Si Hyun finds out and tries to explain everything to Tae Hee. However, Tae Hee is not willing to take him back this time.
31
I Had No Idea I Couldn’t Control My Feelings
2018-05-01
While trying to protect Tae Hee from Ki Young, Si Hyun gets hit in the head by a golf cue. He immediately loses consciousness and is hospitalized. Ki Young goes to Soo Ji and threatens her to stay quiet and not do anything about her two best friends. Meanwhile, seeing what has become of Se Joo and Si Hyun, Soo Ji overdoses on her sleeping pills.
