Mayu Imura enters a monthly dueling contest in front of a local lord. Her opponent is Kinbee Baba. The chapter jumps time frames to tell the story of Mayu's quest to avenge her father against Baba. We learn that Mayu trained under one of the only masters of the Nezu style (or Running Rat style). Her sensei, Nezu, trained her after Mayu's father was killed a few days ago after repeated stalking instances starting two months ago. Her father's dead was never investigated due to his low samurai ranking.

Mayu sought out Nezu after long ago seeing him beat multiple opponents in this very same dueling contest when she was a child and developing a crush for him. She insists on compensating him for training her but after he refuses financial payment she offers her body. Nezu only accepts under the condition that she wins her fight. Nezu smartly advises her to use her massive tits as bait to distract Baba and get an edge on him.

Ultimately, this plan works and Mayu wins. Mayu finds Nezu after the fight dressed ready to fight if she had lost. Later that night they retreat to his dojo and the sexy times begin. We learn that Mayu would bring her father dinner at his job hoping to look for Nezu, this is when Baba would show interest in Mayu and that her father was a janitor.

Once they awake, Mayu gives Nezu a morning cleanup BJ. Baba interrupts after finding the dojo asking for a rematch. It's implied that Mayu set this up as she goes full acting mode and claims her heart and body to Nezu. This enrages Baba which forces Nezu to incapacitate Baba but not kill him, which in his dying state Mayu uses to cuck him immediately by giving him a show.

Mayu then visits her father grave in which Nezu nervously ponders the insane situation that had occurred.