In recent years, there has been a new but terrifying killer organization in the world. This killer organization is called "Ye". It consists of twelve people with different life experiences, and each of them has an astonishing background and an absurdly high IQ. As for appearance, even if he (she) walks in front of you, you may not believe that he (she) is the killer.
There are twelve night demons in total, six men and six women, and their codenames are - Soul Night, Day Night, Moon Night, Starry Night, Morning Night, Qing Ye, Rou Ye, Jing Ye, Meng Ye, Wu Ye, Snow Night, and Ning Ye. Hun Ye is the boss, and their personalities are weird and changeable, but they get along very well with each other, and their love stars begin to quietly fall on them.