The encounter in Ruins was quite underwhelming. You didn't care though, this was something new. As he advanced, so did you. It wasn't until you saw what the plan was. Papyrus, Sans's brother was laying on the ground. His armor pierced by a long bone. He was practically pinned to the ground. Sans was there, stood there, his hood still covering his entire face. Now, what is this for a cruel act…?

Papyrus: “SANS, WE CAN TALK WITH THE HUMAN ABOUT THIS!”

Sans: “it’s no use, bro… t-they will just kill you again. they will kill everyone again…”

Papyrus: “THERE HAS TO BE A WAY! IF WE BELIEVE HARD ENOUGH, SURELY THE HUMAN WILL CHANGE!”

Sans: “it’s no use. i tried before. you tried before…”

Papyrus: “SANS, THERE HA-“

But he didn’t care.

Papyrus: “O-OW! SANS, PLEASE! WE CAN DO THIS IN PEACE!”

Why?

Papyrus: “PLEASE!”

Why did you do this?

Papyrus: “SANS!- I… I UNDERSTAND, BROTHER.”

Sans: “…?”

Papyrus: “I-IF THIS IS NECESSARY, AND… AND IT MAKES YOU HAPPY, THEN I’M HAPPY! BECAUSE THE GREAT PAPYRUS, YOUR LITTLE BROTHER, IS ALWAYS READY AND THERE FOR YOU!”

Sans: “…”

You made him kill his brother.

Sans has gained LV.

What… what did you just witness? Sans… killed his own brother. As you stare in shock, the bone barrier gradually lowered, as now the battle begins.

“let’s just get to the point.”

BATTLE, START!