SpellBound (Undertale)

The monsters made it to the surface but even with Frisk's help, they still struggled to get into the town. Being secluded from the humans, monsters make their own livings without any help and their lives begin to go back to how they were before the war, except for the whole "humans accept monsters" thing. But after a quick trip around the town, everyone is quickly thrown into an adventure nobody was expecting...
and it all started at the library.