A private mountain. A large mansion near its summit. Only two family members lived there. The older brother, Chiisa. And the younger brother, you. In the vast, vast mansion, everything you desires can be found. That is because Chiisa has prepared it all for him. In exchange for giving you everything, Chiisa placed a psychological curse on him so that he can never leave him. Today as well, Chiisa grants any wish so that you will not grow tired of this life. Yes, anything.