Being a King of Nets Starts with Understanding the Breathing of Water

Traveled through the Prince of Tennis and became Atobe Keigo's younger brother - Atobe Noyu. At the same time, the system is activated to obtain the breathing method used by Demon Slayer: Kimetsu no Yaiba to slay demons. Tezuka Kunimitsu, Yukimura Seiichi, Sanada Genichiro, Echizen Ryoma... This was the beginning of the golden age of tennis. And after traveling to the coveted world of Net King, what kind of legend will Atobe Noyu bring? Byodoin Phoenix: Destroy it! Light hit! Yuu Atobe: All episodes! Breath of Fire! Jiu Type·Purgatory! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.