100% Love From The Boss - Chapter 357 - My Godmother Was Unreliable!

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!

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

"When will people understand.... I'm only half insane?"

The teenager Long Ao, ten years of silence, was reduced from genius to waste, and was ridiculed and mocked.

Ten years of persistence, ten thousand failures, and finally won mysterious Dragon Seal.

With Primal Chaos Saint Body, cultivation invincible cultivation technique, refining Heaven and Earth, devouring endless stars, sweeping the wasteland! Ask the vast stars, who dares to fight me? Boundless Starry Sky, War God! …

- Description from Uukanshu