This is a very creative AU. Like Underswap, the personalities of the characters are all jumbled up. Toriel becomes Sans, Asriel becomes Gaster, and Asgore becomes Papyrus.

The designs are unique but it mainly focuses on Toriel, Sans, Papyrus, and (surprisingly) Asgore. It would be better if there were more characters.

I give it a 8/10.