A love triangle that hits all the right notes. Hoping to ditch her tomboy reputation and transform herself into a cute, maidenly girl, the fiery Chika picks up a flute and joins her high school s wind instrument club. Her decision to become a world-class flutist is only strengthened after a chance encounter with the handsome club supervisor but she s not the only one with eyes for the talented Mr. Kusakabe. Her childhood friend Haruta also hopes to win their teacher over with his musical prowess and penchant for solving mysteries. As the two work together to recruit more students into the club, they find themselves faced with puzzle after puzzle. Between secret codes scrawled on chalkboards, unsolvable Rubik s Cubes, and haunted apartment complexes, Haruta and Chika will have their hands full practicing their scales and balancing their love triangle.