Naruto: The Strongest Kakashi - Chapter 395 Kakashis Mistake

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.

Young Master He had always been a male god in the eyes of others.

Until one day, the god-like him died.

And he became the much detested white silk trouser-wearing second rich generation.

Male God He was unaffected by this.

In his previous life, he had sacrificed everything for his clan, now, he could finally break free from that tiring life.

The only thing was that he had gained a handicapped partner.

Initially, he thought his partner was just a weak, gullible and pure lamb.

In the end, a certain person changed entirely making everybody cry and shout daddy.

- Description from Novelupdates

Transmigrating to the disciples of the Demon Sect, and relying on the skill modifier to become a giant of the Demon Dao.

[Detected the technique “Blood Nerve”, relying on devouring blood to practice]

[Side effects: easily affected by the spirit contained in the blood, becoming bloodthirsty, bloodthirsty, mad, and even brain dead]

[Please wait a moment, the system is being modified…]

[Ding! The modification is complete, and the side effects are cancelled]

- Description from novelbuddy