In an imaginative village, lived a tribe named Nemow. They were known for their unique women who could transform their bodies into beautiful beings. This could happen only when the girl reached puberty, and then each month she was able to switch her form for seven days straight. Some girls had more than seven days to enjoy themselves, while others had less. However, as special as it may sound, the transformations had one serious issue. "The transformations may be pretty for the eye to be pleased, but the hidden truth lies behind the girl's mental state. A girl's joy may bring out an angelic being, but her sorrows would hunt her heart and change her form into a hideous ugly beast, led by hatred and anger. A murderous dark and terrifying machine, unpleasing to the eye ready to turn an innocent soul into a targeted prey. For that, beware of a girl's mental state. Beware of the villagers' mental state. Make the village as joyful as possible. Eliminate any source of anxiety. And last but not least, never awaken Trauma." This was the warning given to the people of Nemow by their ancestors. The old ones who had seen it all and had done their best to keep their village safe. For generations, the Nems lived in peace due to the laws put by the first ones. However, the issue was long forgotten. Though written in many of their books, it had become nothing but a legend to the villagers, and the girls' mental health was slowly neglected. And for that, Bad things started happening.