Accidentally traveling to the world of the comic version of Prince of Tennis caused a change in the world line.

The champion Rikkai University completed an unprecedented three consecutive national championships.

Kunimitsu Tezuka did not let injury ruin his three-year tennis career.

Echizen Ryoma has completely turned evil, and he firmly believes in staying in the American team and waiting for an opportunity to avenge Byodoin Phoenix.

...

The person who triggered this butterfly effect was a Quincy who escaped the large-scale [Sacred] punishment when Yhwach awakened and fled here.

(There is no female protagonist in this article!)

Takahashi Hikoichi travels to the world of Prince of Tennis, joins Rikkai University at the beginning, awakens the idle system, and becomes stronger just by lying down.

"After a day of idle time, my tennis skills have become roughly proficient and I am now at the regional level."

"After a week of playing, my tennis skills have been perfected and I have reached the Kanto level."

"After a month of playing, my tennis skills have reached perfection and I am now a national-level player."

……

"After a year of playing, my tennis skills have reached the pinnacle. I have realized the unity of man and nature, created my own magic skills, and have world-class strength."

While others are training, he lies down!

I thought he was just a loser, but I didn't expect his strength to increase instead of decrease.

Everyone was shocked!

He became a legend at Rikkai University and reached the pinnacle of the tennis world...