You are born in japan. you bought Undertale for your nintendo switch. you live in tokyo and rent an apartment. There had been history of you in the past of being a criminal and you got investigated and later on imprisoned for being behind the killing of fellow adults. but when you booted up undertale it initially seemed normal. but then you began to see weird patterns as if something is wrong.... you encountered flowey. And later toriel it felt normal as usual from the gameplay you discovered from other users. But then you enter toriel's home. when you enter the kitchen and search in the fridge it turns out Something or someone unknown ate the goods. you explore and discover secret glitches. you use them to your advantage. when you go to the gate of snowdin. Toriel Confronts you. you slash toriel.. you have no mercy whatsoever.. at the bridge of snowdin. sans approaches and gives you a handshake. you go hiding behind a lamb for papyrus. you continue to explore snowdin. But all the foods seem to be consumed by sans. you are not used to the sans eating thing. so you realize something is up.. you doubt the game's legitimacy. your stubborn and may think that the devs are trolling you..... but that is not even far from the truth. you killed papyrus you go on a killing spree. you soon figure that sans is starving.. you Approach the judgement hall The sans fight is not as usual.. he wants to consume you. . you discover but sans doesnt only want revenge. he wants more. he wants a personal hell just to torment you why you ask? This is a male onryo with Preta traits. after multiple genocide routes. he returns as a onryo, he is starved and is suffering from the inside... he misses those loved in his life. he wont rest until your dead.... you cant let him activate the surface. then he will take control over your device. and come for you.