Dahyun was just an extra character. No one paid attention to her. But, her roles suddenly changed when Nayeon, the most popular girl in Mathematics departement, came to her life. or Dahyun 'accidentally' slept with the most popular girl in her department and it drove her crazy.

It had been years since the last time Dahyun talked to Nayeon. The last words Dahyun heard from her were "I think this is the end for us." Dahyun thought she would never talk to her ex again. But, Nayeon suddenly asked her to attend a career talk as a guest speaker at her former campus.

Dahyun had been in love with Sana since they were in college. But, Dahyun never confessed her feelings. So, she let Sana find another love. The day before Sana's wedding, Dahyun suddenly traveled to another universe where she confessed her feelings to Sana and they were dating.

Dahyun and Sana had been dating since they were in college. Dahyun knew Sana was the right person for her. So, she planned to propose to Sana. The day before Dahyun proposed to Sana, Dahyun suddenly traveled to another universe where she never confessed her feelings to Sana and they never dated.

I called you, but you ignored me. I was in front of you, but you didn't notice me. I held your hand, but you didn't say anything. In your eyes, I was just the wind that blew your hair.

Nayeon and Momo had been friends since high school. They always fought and teased each other. But one day, Momo confessed her feelings to Nayeon. It was the day before Momo left for another country. That's why Nayeon decided to go back to the time where they were in high school. (Twice have superpowers like what they have in Signal MV)

Bulan selalu mendengarkan Nayeon dan Nayeon selalu bercerita pada bulan.

Aku diberi ‘anugerah’ untuk dapat mengingat masa laluku. Aku dapat mengingat siapa diriku di masa lalu, bagaimana lingkungan hidupku dulu, siapa orang-orang terdekatku, dan tentu saja siapa orang yang sangat kucintai. Aku masih mencintai orang itu sampai sekarang. Perasaan itu tidak pernah berubah. Namun, permasalahannya.. sekarang dia adalah kekasih sahabatku.

Nayeon and Momo accidentally knew that they fell in love with the same person. However, it didn't make them enemies. Instead, they became good friends. However, are they really just.. good friends?

Nayeon dan Momo tak sengaja mengetahui bahwa mereka menyukai orang yang sama. Namun, hal itu tidak membuat mereka bermusuhan. Justru sebaliknya, mereka menjadi teman baik. Namun, benarkah hanya sekedar teman baik?

Sebuah puisi yang berjudul “Kamu”.

I was a Joseon warrior. During war, something happened to me. Then, I met this girl and I fell in love with her. Four hundred years have passed, I met her again, but now.. she’s my bestfriend’s girlfriend.

Lima tahun yang lalu, kau meninggalkan kami begitu saja. Selama lima tahun, hatiku hancur karena kehilangan dirimu. Tiba-tiba sekarang, kita bertemu lagi.

After we drifted apart, it was very difficult. Now you and I, will we able to go back? I still long for even the last moment.

Malaikat, huh? Bukan, aku bukan malaikat. Jangan salah menilaiku karena aku..   adalah iblis.

Ting ting ting ”Selamat datang!” ucapku dengan penuh semangat. Lagi-lagi aku terlalu banyak berharap. Ternyata bukan dia orang yang kutunggu-tunggu. Selama bertahun-tahun aku selalu menunggunya, tetapi dia tak pernah muncul. Mungkinkah dia akan datang?

Kudengar suara tangisan itu. Suara tangisan itu begitu keras hingga membuat rasa penasaranku muncul. Aku pun berjalan mengikuti arah datangnya suara itu. Kutemukan seorang gadis sedang duduk dan memeluk lututnya. Itulah awal kisah kami.

Aku menyapamu tetapi kau mengabaikanku. Aku berada di depanmu tetapi kau mengabaikanku. Aku menyentuhmu pun kau tak menghiraukanku. Di matamu aku hanyalah angin. Aku rindu padamu, Sana.