After her mysterious and untimely death, a girl is given a second chance at life — as an android. Now, she must recover her memories, while keeping her identity a secret from her new friends.

Vivi's mind was fuzzy. She listened to all you guys talk as she sat there, still and silent, as always. She was jealous. So jealous. Jealous that your guy's heart was able to beat. She heard you, Heejin, Hyunjin and Haseul make plans and wondered if she would be invited too...