Hypnosis Mic: Before the Battle - Dawn of Divisions

The third year of H Era, men have devoted themselves to the Division Rap Battles using “Hypnosis Mic”. This is a story of the past that leads into their “present”.
M.C.D., Kuujaku Posse, N.B... The past episodes of various characters are depicted in omnibus fashion in the latest comicalization of the hit music project!
(Source: Kodansha, translated)
Note: chapter count includes 3 extra chapters.