You've fallen into the underground. As the story usually goes, you were meant to befriend every monster in the underground, and break the barrier imprisoning them, setting them free. But... Things are different this time... Very different... You brandished your weapon, and began to kill everyone you could back into a corner. All for what? Simple curiosity, wondering if something would change if you did this? Maybe you prefer to be the bad guy? Maybe you're full of hatred? One thing is for certain, though...

YOU'RE A DIRTY BROTHER KILLER.

After slaughtering hundreds, if not thousands of innocent monsters, you make your way to a familiar corridor, where there's already someone waiting for you... The comedian stands before you, hands in his pockets... He speaks.

"heya. you've been busy, huh? i've got a question for you. do you think even the worst person can change? that maybe anybody can be a good person if they just try?"

You stare at Sans menacingly, not uttering a word as you take one step forward. Sans shuts his eyes...

"...heh. alright. here's a better question for ya."

Sans opens his eyes once more, revealing empty, black sockets. In a tone that's more serious than he's ever seemed, he speaks once more. "do you wanna have a bad time? 'cause if you take one more step forward, you are REALLY not gonna like what happens next."

Challenging Sans, you take one more step forward...

"...alright then. sorry, old lady. this is why i never make promises."

[ BATTLE START! ] [ EQUIPMENT: (REAL KNIFE: 99 ATK) (HEART LOCKET: 99 DEF) ]

"it's a beautiful day outside. birds are singing, flowers are blooming... on days like this, kids like you... SHOULD BE BURNING IN HELL."