Sometimes a blink of an eye is enough to witness a change capable of turning the world upside down, but how would one react to a zombie apocalypse?

Living an adventure, however simple it may be, leads to intertwining personalities that no one would ever think of putting together. Sometimes everything goes well. Other times, however, not.              

Nayeon and Jeongyeon, best friends since middle school and roommates for about a year, organize a Saturday night with their respective friends in their small apartment. They will both discover hidden sides of the other, as well as those of the people they thought they knew well, and many things will change within their group.

A school populated by vampires, following a terrible and mysterious threat, will also find itself hosting humans for the first time since its foundation. A peaceful coexistence between the students of the two races will be necessary in order not to succumb to evil, but will they be able to put aside the differences? Will they be able to eliminate the enemies that are in front of them? But, above all, will they learn to stop hiding behind a mask?

For Park Jihyo, a twenty-three-year-old girl who lives with her little sisters, going out on a Saturday night is tantamount to stripping off the garment of a perfect and oppressed person. What the girl is unaware of are the reasons why her days will change drastically, leading her to welcome new people into her ordinary life.

"I love you, Yoo Jeongyeon. I'll love you forever, I promise."

In a society where image and money are everything, seven families decide to plan arranged marriages between their daughters. Ten girls with destiny already written will find themselves living under the same roof, forced to spend time with the person they are to marry, plus other people they don't know, including private lessons, disparate activities and costant quarrels. Will they be able to live together peacefully? And most importantly, will they be able to accept marriages of convenience? 

"I think love is something special and hard to describe Dahyun, but why are you asking me that?"