You're a graduated student on Majisuka jyogakuen, in dark stairs, you don't know that you have been followed by a Majijo third year student who never graduated named Gekikara, she always following you and fight with you since you third years with her,

she walks tottering like a pyschotic drunk person and giggles creepy at you

“hey, are you mad?” asks Gekikara, with pyschotic gaze, then she Kabedoning you