Sequel to Kengan Asura. Takes place 2 years after the tournament.

This serie is a prequel of Kengan Asura series.

Sakura Hibiki is your average High-school girl, with a voracious appetite. Noticing her clothes tightening in lieu of her slowly expanding waist line she decides to look into enrolling in the nearby Silverman-Gym. There she runs into a girl from her grade named Souryuuin Akemi, who is also the Student Council President at her school. Akemi, who has a muscle fetish tries to get Hibiki to enroll in the Gym despite its high ratio of Macho-Men (which Hibiki dislikes). Thankfully a beautiful Trainer named Machio appears and unknowingly convinces her to enroll and start her quest to a great body.

Since the Edo periods of Japan, gladiator arenas exist in certain areas. In these arenas, wealthy business owners and merchants hire gladiators to fight in unarmed combat where winner takes all. Toki Taouma, nicknamed "Ashura", joins these arenas and devastates his opponents. His spectacular ability to crush his enemies catches the attention of the big business owners, including the Nogi Group chairman, Nogi Hideki.