Autumn Grove (秋の木立) is a story of the Pure Heart: Ninjutsu Chronicle. It was created in August 2011 and was finished October 13, 2013.
MGW's idea behind this story was to portray Hayashi's acceptance as a nusubito, which is a term for thief/robber, but describes an immoral ninjutsu user. It also shows what his leader allows. Also, MGW wants to describe a spear vs sword battle, and how range creates an advantage in combat.
The "character scroll" is about the nusubito Hayashi. He is described as a dangerous person who is not afraid of death, and he is given the nickname Ashura (阿修羅) for his greediness and pride.
It is the 7th year of Tenshō (1579). A member of the Fuuma shows off his individualistic character and infiltrates Kasugayama Castle (春日山城). Samurai from the Uesugi Family are stirred awake by the sound of a young woman's voice, and are led to Bishamon Temple (毘沙門堂) for a battle. A foolish lone fighter carrying a Jumonji spear drops the naked body of the sister of one samurai.
- Main character; he captures a girl to provoke opponents outside the castle walls to challenge. His main weapon is a Jumonji spear.
- (お果絵) The woman who Hayashi captures to provoke some warriors to chase and fight him. She is stripped.
- (確丸) B. 1564. A young samurai who battles Hayashi at the Bishamon shrine. He's rash.
- (才五郎) Samurai who accompanied Katamaru while chasing Hayashi.
- Goemon Ishikawa
- A former Iga. He followed Hayashi to keep an eye on him.