(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...

A time traveler travels back in time and becomes the Fourth Hokage Minato Namikaze, who was reincarnated by Orochimaru.

Sarutobi Hiruzen: Minato, why have you become so cruel? You are no longer the gentle and kind Minato I knew.

Orochimaru: Why is his power so strong? What kind of power is this?

Minato, to thank you for taking care of Naruto for so many years, I will send you to hell!

After passing through Kuroko's Basketball, Lin Ye became known throughout Teiko as the "basketball idiot".

Until that day, he touched Aomine Daiki's head...

[Ding! Touching Aomine Daiki has successfully copied his talent "Formless Shot"! Awakening level 30%!]

[Hot Forum Post] "The New Demon King of Imperial Light! Is Lin Ye, who pats everyone on the head, a model of etiquette or a gifted bandit?"

[Opponent Collapses] A national-level ace player, clutching his head, frantically swerved around the court: "Coach! He's coming! He smiled at me! Time out! My hairstyle can't be messed up!!!"

Aomine Daiki (crouching down with his head in his hands): "Don't touch me! Why is your 'no-holds-barred' style even more lewd than mine?!"

Murasakibara Atsushi (shrinking in a corner): "I was wrong, I'll never say you're weird again, please give me back my power..."

Midorima Shintaro (glasses shattered): "My absolute accuracy? No! Yours is a lock-on cheat! I'm reporting you!"

Ryota Kise (questioning his own existence): "It takes me five minutes to imitate him, but he copies me... in just one second? Who's the real genius at imitation here?!"

Seijuro Akashi (Emperor's Eye goes out of focus for the first time): "I can see into the future, but I can't see into you... Am I the next person to be copied?"

When everyone thought that replicating Qingfeng was Lin Ye's limit—

In the national competition finals, he gave a friendly smile to the talented exchange student from the United States.

"I heard your 'zone' is a unique talent?"

"Now, it's mine."

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.

"Even Ryuzaki Sumire can be a coach! Why can't I be one?!" "Self-study? What's so difficult about that? Besides, I'm a master at making motivational speeches!" Makihara Keiji, wearing an apron, said. ...

Every time I watch Slam Dunk, I see a guy who hasn't played for two years, but can still burst into amazing performances against top teams like Shoyo and Sanno, pulling the team out of the abyss time and time again.

At that time, I always wondered how strong Mitsui would be if it didn’t have a two-year gap?

And now, a basketball enthusiast from later generations travels to the world of Slam Dunk and becomes Mitsui Hisashi. What kind of achievements will he achieve without the two-year blank period?

Traveled to the Prince of Tennis and became a member of the Hyotei tennis club.

The competition is about to start... I feel so weak and frail, what should I do?

Miyashita Rin suddenly discovered that as long as she took care of her health, she could continuously improve her strength!

Strength, speed, skill, mental strength...

Make up for it!

Essence, Qi, Spirit… Mind, Eye, Manas, Alaya…

Make up for it!

The supreme realm, the dimensional world?

Make up for it!

Suddenly looking back, Miyashita Rin was about to take care of herself, take a walk with Big Bear, drink some more tea and lie down, but she found that she had already stood on top of the world...

Levels: Cannon Fodder, Regional, Metropolitan Competition, Kanto, National, World (Physical, Mental), Ultimate (Three Paths Ultimate)

ps: I really don’t know how to write an introduction, please move to the main text~

A former key server for a university volleyball team accidentally travels to the world of Haikyuu Shonen and restarts his life. This time, he is no longer willing to be that unknown key server. He becomes the team's ace, the absolute main force in the hearts of his teammates, and leads his teammates from Karasuno to dominate the country!!!

Synopsis of the novel *Diamond Ace: The Magic Pitcher Savior*: Written by Flying Bear Knight, the novel tells the story of Li Lei, who encounters a mysterious father and son on a bridge, thus beginning his journey as a magic pitcher. This is the most terrifying pitcher legend in Koshien history… and also the most legendary underdog story in Koshien history! …