Year XXXX. The Third World War caused the world to lose one-third of its population. Fearing the extinction of humanity, those in power sought to avoid war not through force, but through debate. —Yet foolish men did not cease their conflicts with weapons. And in the final year of the old era—... The existing world came to an end at the hands of women. H Era. War by force was eradicated. Conflicts were replaced not by weapons, but by special microphones that interfere with the human psyche. Their name: "Hypnosis Microphones." The lyrics transmitted through these mics affect a person's sympathetic and parasympathetic nerves, among others, making it possible to induce various states. Year 3 of the H Era. People use rap to determine superiority. Men live in districts such as: Ikebukuro Division Yokohama Division Shibuya Division Shinjuku Division ...and others, excluding Chuo Ward. MC groups representing each division battle one another, and the winning district can acquire a designated portion of another territory. In a world where words, not weapons, hold power, the division battles for men's pride now begin.