Tennis: Starting with Ryoma, Double the Return

A sports idiot travels to the world of Prince of Tennis.

Poor talent?

It doesn't matter, the double return system allows you to show off, directly bind to the protagonist, and double the return strength.

"If everything can be bound, why can't we bind Nanjiro?"

[Nanjiro is the boss, no less than the son of luck. ]

"Ryoma, you're nine years old and haven't even started the Thousand Hammers Training yet. I'm deeply worried."

Many years later, after leaving the professional arena, Delongma wrote a book titled "The Story of My Brother Pushing Me to Achieve Growth"