The story for anontale it was a universe the  when scientists started to experement with dt on living things testing the reset out. One of the experments went wrong and omega psi was born  who took everyones souls but anonis and basically blew up destorying the universe and causing the dt clouds to form witch made it it impossable for any monster not born into dt like anoni to live there! It constantly rains dt and anoni is the lone survivor! She lives in underswitch now! But now she is pretty much immune to death because of her DT! She also frequently looks for survivors of omega psi since the dt rain randomly brings monsters back. The only one she found so  far is the flower flo witch is now extremely unstable and randomly melts but due to the dt she aways reforms!