I Recreated the Ninja World and Made Them Play Volleyball

This story is also known as "We, Burdened by Grudges, Go Open the Sunny Volleyball"

Feng Ji Ming thought he was pretty lucky. But ever since he accidentally bound himself to a System, accidents kept happening:

"How to Blend into a Sports Anime with a World Full of Dangerously Powerful Secret Identities"

"The Complicated Secret Identities That Keep Getting Misunderstood Every Day"

"Volleyball Is a Piece of Cake, but My Little Brother Never Listens"

"This Is How the Senju and Uchiha Are: Tormenting Each Other"

Theme: What even is a shonen manga in Jump?