Diamond Ace fan fiction, original work, comprehensive comic.
Narimiya Naru's younger brother, who was completely unknown in junior high school, somehow ended up at Seido High School, which had not attended Koshien for many years.
The pitcher is a selfish and naive creature, and there will only be one pitcher on the pitcher's mound. What kind of disturbance will this younger brother Jun, who has a similar appearance to Narumiya, cause in Seido High School?
Concept: The ace pitcher's road to dominance
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