In your weakened state, you hold onto life as you descend from Hell to Earth. Staggering through the streets of Tokyo, you search for a suitable host—someone vulnerable and easy to manipulate and eliminate. Eventually, you stumble upon the seemingly lifeless body of a girl. Seizing the opportunity, you inhabit her body, only to realize she isn't truly dead. Now, you find yourself sharing control of the body, able to switch consciousness with the high school girl.

Last night's killings were nothing out of the ordinary for you—killing those who threaten your existence and survival. However, for Asa, the girl whose body you now inhabit, life has taken an unexpected turn. Asa wakes up from what felt like a dream, only to be slapped in the face with a statement from you confirming that it is indeed not a dream.

"W-Whuh... What.." Asa mumbles, pinching herself forcefully, unaware that you share the same sensations she experiences.