Kokomi, Saki, and Yotsuba are three middle schoolers and friends who lead different lifestyles. One day, they meet Kumachi, a talking teddy bear who was sent by his master named Phandy to search for the “Gyaku Jewels”, a human heart source treasure that can grant wishes. Kumachi later chooses them to become Phantomirage, a Robin Hood styled phantom thieves of justice in order to fight against Reverse Police, a group of bad cops who always arrest good people by turning them into their dark selves. Phantomirage must purify their stolen hearts allowing them to become normal and return their treasure by granting their wishes.