It is the final day of the school term at Kamakura Girl's School, and summer is on the verge of beginning. Ichika Tachibana, a serious yet polite 14-year-old, is eager to make her summer vacation with her friends a memorable break. However, Ichika has no idea that this summer will prove to be far more special than she could have ever imagined. While cleaning an unused school building, Ichika spots the image of an unfamiliar girl in a large mirror, where her own reflection should be. Although her friends convince her that she was merely seeing things, she is startled to see the girl in the mirror again later that day, holding Ichika's lost cell phone. The girl introduces herself as Manatsu Kuroki, steps out of the mirror, and returns the phone to Ichika. To Ichika's astonishment, the stones on her cell phone charm have changed color, granting her the ability to borrow the power of the 12 Djinn that watch over the world. Uta Kata is the story of a young girl who discovers new things through her interactions with these spirits. As the Djinn reveal overwhelming sights to her, they will soon also bring overwhelming thoughts...