Synopsis:
 

          Krystal finds out she is pregnant and decides to keep it a secret from her boyfriend Jinho after learning that he would break up with her if he finds out. She decides to have an abortion but she chickens out. She figures that she has to keep her pregnancy a secret from everyone for now. One day, she feels like throwing up but there are other students in the bathroom so she runs up to the roof which is usually empty. Up there, she encounters Jang Hyun Seung who wakes up after listening to such unpleasant sounds. Krystal runs away hoping that he didn't catch on that she's pregnant.
          The day finally comes when Jinho finds out that Krystal is carrying his child. He runs away at the news, leaving Krystal alone. The next day, Krystal sees Sunyoung and Jinho holding hands, which shatters her heart even more to learn that her best friend has been dating her boyfriend behind her back. That is when Hyunseung begins walking into her life step by step to support and protect her. Before she knew it, Krystal has fallen deeply in love with Hyunseung, but only to get her heart shattered again because of the events that follows in her life.

Jung Krystal (F(x))

Krystal is an orphan and a high school student who is dating a guy name Jinho for over a year. The story starts off with her at a clinic where she discovers that she’s pregnant. She is afraid that Jinho will break up with her if he finds out that she’s carrying his child. She even thinks of getting an abortion, but ends up running away at the last minute.

Jang Hyunseung (B2ST)

Hyun Seung attends the same high school as Krystal. He happens to be alone at the roof one day and sees Krystal running out into the open and vomiting. He’s the first person to find out about her pregnancy. However, despite her situation, Hyun Seung becomes attracted to Krystal and decides to walk into her life. When Krystal asks him why is he supporting her, he would always say “Because you’re beautiful.” Even though he seems to be a carefree person according to Krystal, there is a secret that he is keeping away from the world, including Krystal.

Park Sunyoung (F(x) Luna)

Sunyoung is Krystal’s closest friend, but she developed feelings for Jinho. She and Jinho are dating for a month already before Krystal becomes pregnant. Sunyoung continues to keep this secret from Krystal because she doesn’t want their friendship to end just like that. She has been urging Jinho to break up with Krystal so she wouldn’t feel too guilty.

Lee Jinho (Fictional)
Jinho is the boyfriend of Krystal. He does not like troublesome things and he is relieved when Krystal lies to him that she isn’t pregnant. He is cheating on Krystal with Sunyoung and plans to break up with her anytime soon but doesn’t have the guts to tell her until he finds out that she is really pregnant.