Net King: Fuji's Brother, a Peerless Genius!

He accidentally entered the world of Net King and became Fuji Shusuke's brother. He does not have an invincible system like other time travellers, but his super talent is the envy and fear of everyone! Fuji Shusuke: "My brother, he is truly a genius!" Ryuya Echizen: "Even if his talent is higher than mine, he actually works harder than me!" Byodoin Phoenix: "I don't understand why destruction and survival can coexist in his tennis!" Echizen Nanjiro: "You say he is the first person after me? Don't be kidding! He has already surpassed me!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.