Prince of Tennis: Light Fighter

Sato Kiyokawa, a traveler from another world, came to the world of Prince of Tennis with the Pika Pika no Mi from One Piece, as well as Observation Haki and Armament Haki, so he must have left some traces of his own.

Seiichi Yukimura, Kunimitsu Tezuka, and Jin Akutsu, as the super elites of the golden generation, their destinies must be changed, allowing them to go further, eliminate those regrets, and lead them to an era of miracles.