Diamond makes an Underswap Frisk x Sans story due to a poll he made on his Undertale Amino account. The full story will be posted here, in a Google Document, and on his Undertale Amino page. This story will have a lot of parts, and already have about 10 planned, so stick around! Full story by ItsJustDiamond All thumbnail/background art goes to their respective owners Underswap by popcornpr1nce

As you may know, Frisk in Underswap is evil, or that's what everyone assumes. This will be in her and Blueberry's P.O.V, Blueberry seems to know that she doesn't want to be the bad guy (or girl in this case) anymore and immediately tries to help her.