Two weeks before a concert at the Yaon Hibiya auditorium (August 26, 1987), while performing at the Shinjuku Loft club, GASP's lead vocalist To-Y (pronounced to-o-i) is ambushed by rival Aikawa Yoji. GASP is an up-and-coming band notorious for its violent streak, struggling to gain traction against the immense popularity of the chart-topping, fan-beloved Aikawa. The Yaon Hibiya show represents GASP's mainstream breakthrough out of the small-time club scene, but that opportunity is jeopardized by the schemes of Aikawa's manager, Ms. Kato of Koyama Productions. Kato wants To-Y to leave that "bunch of hoodlums" and go solo under a major label.
Adding to the turmoil is a mysterious character who displays feline qualities, named Niya. Niya introduces herself as "To-Y's aijin" ("Niya, To-Y no aijin da yo!"), much to the dismay of Koishikawa Hiderou, who has feelings for To-Y. Koishikawa, also called "Sonoko-chan," is referred to as an "okama" by Niya. A recurring motif is that GASP, its fans, and its associates are viewed as abnormal by mainstream society, as reflected in their musical tastes, clothing, and habit of drinking Classic Coke—a factor that only intensifies their struggle for acceptance.