Under the Oak Tree (Web Novel KR) - Chapter 271

Jiu Xuan Xian Zunlin also unfortunately encountered the legendary dragon attack when he was robbed and thundered. He returned to his youth and became a high school student Lin Yi. He also found his left hand position and was sealed with a dragon..

Since then, Lin has stood in a new world with a strong attitude, punching the old tyrannical gangsters, kicking and defeating the family.

As a result, a strong newcomer rises and officially opens.

- Description from Uukanshu (translated)

Nagasawa crossed to Naruto Universe and was bound to Konohagakure.

If Konoha is severely damaged and destroyed, Nagasawa’s lifespan will be reduced.

He panicked at the thought of the upcoming Nine-Tailed Demon Fox’s attack , and the thought of Konoha getting destroyed left him in despair.

Fortunately, while bound to Konoha, he can obtain templates of powerful characters.

At the beginning, He got the Whitebeard template! Since it’s the Whitebeard from the Summit War of Marineford, he can use Tremor-Tremor Fruit’s ability and Haki.

Facing the Tailed Beast Ball, which terrorized Konoha Shinobi, Nagasawa leaped and shattered the Tailed Beast Ball with one punch!

- Description from Novelupdates

In this world, Planet Earth had undergone great changes and humanity is faced with extreme danger. Luckily, humans have something called the Heaven Dao software.