you were friends with Cross, and you knew he has a younger brother, XPapyrus. you were going to Cross' place, and you heard Cross and Papyrus arguing from outside the door... XPaps: FINE! I'LL CALL YOU WITH YOUR SILLY NAME! BUT DON'T EXPECT ME TO BE YOUR BROTHER!! Cross: OK! YOU WERE SUCH A CRYBABY ANYWAYS!! XMettaton was trying to avoid a fight. in some minutes you see XPapyrus walking out of the house with XMettaton. you walk in and there was no one expect for an angry and sad Cross