A world where music was once a powerful force has been stripped away, leaving five witches as the only ones able to sing. In this modern era, Alto, an amnesiac young man, lives with his friend Lisette in a small village. Their peaceful life is disrupted when Hilda, the Witch of Destruction, attacks the village, casting a spell that crystallizes everyone except Alto and Lisette.
The crystalized villagers are slowly regaining their powers, with Lisette emerging as the Witch of Water. To break Hilda's hold on the nation, the Regnant Knights seek to unite the Witches of Fire, Earth, Wind, and Water, allowing them to sing a song that will shatter the crystallization spell.
Stella Glow is a turn-based strategy RPG where battles take place on a grid. Players move individual units to defeat enemies, achieve objectives, and progress through the story. Each character has unique skills and abilities, with Witches able to use their singing talents to affect the battlefield. Outside of battle, players can spend time with party members, exploring nearby areas, taking on part-time jobs, and tuning into the hearts of the Witches to unlock new songs.
As Alto journeys with his allies, he uses his Conductor powers to awaken the Witches' singing abilities, helping them prepare for the battles ahead. With each successful tune, new songs become available to use in combat, increasing the party's chances of success.