Eun-Jin (Gang Ye-Won) has failed in love 6 times. She struggles now to find her seventh love. Hyeon-Suk (Song Sae-Byeok), who is not interested in love or marriage, is her seventh love. Considering that her seventh love is her last, she tries her best.
A new born girl is placed in a coin operated locker in the subway station. The girl is raised by a mother (Kim Hye-Soo) who is the boss for a loan shark group. Later, when the girl has grown into a teen, she carries out missions given to her by her mother.
23 people participate in a game of psychological warfare in which they wear a special device called “SCM” which can be used to turn other players into their slaves. Eia Arakawa is a girl with a cold personality who dabbles in various romances without taking anything too seriously.
Shun Takahata (Sota Fukushi) is an ordinary high school student leading a boring life. His life long friend is Ichika Akimoto (Hirona Yamazaki).
One day, a teacher’s head explodes in class. Shun Takahata and his classmates are forced to play a game of death without knowing who, why or how.