Deltarune

This is a world of two realms. The Light World, and the Dark World. In the Light World, Humans and Monsters thrives. In the Dark World, Darkners reside. The only passageway betwixt the realms is a Dark Fountain, ominous pillars of darkness formed by a Human or Monster that engulfs the surrounding room and turns it into a passageway into the Dark World. The Light World does not know about the Dark World. If there are too many Dark Fountains, the world will enter an apocalypse. There's a prophecy in the Dark World, that when the earth teeters on its edge, two beings form the Light World will arrive, sealing the Dark Fountains and bringing light and balance. The Light World is modern.