Where are we?

Fairy Tail was disbanded after Tartorse, everyone went their separate ways, everyone except Lucy Heartfilia. Lucy decides to move into the forest that's near Magnolia, what happens when she is heading back to her cabin in the forest, she comes across the Undertale multiverse fighting a dark guild and losing. Will she help them. And what's this about her disappearing off the Council's radar?
I suck at descriptions, sorry.