The H Era: an age where war by military force has been eradicated and women have seized hegemony. In a district called Chuohku, where men are completely excluded, politics are conducted by women. Under the H Bill established there, the manufacture of all weapons intended to kill or wound was prohibited, and the disposal of existing weapons was ordered. However, conflict did not disappear. Conflict was replaced not by military force, but by the "Hypnosis Mic," which interferes with the human psyche. Lyrics channeled through this mic act on the human sympathetic and parasympathetic nervous systems, possessing the power to induce various states.

Men live in districts outside Chuohku, such as Ikebukuro Division, Yokohama Division, Shibuya Division, Shinjuku Division, Nagoya Division, and Osaka Division. MC groups representing each division use rap—which has an affinity for conflict—to battle, and the winning district can acquire a designated portion of other territories.

In a world where words, not weapons, hold power, a territory battle for men's prestige begins.

And this is the story of the third member of Nagoya Division, Hitoya Amaguni.