MTL - When a Fanfic Protagonist Transmigrated into the Original Novel - Chapter 67

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

After being transported to this world, Nara Kazuki discovered that as long as he grinded enough proficiency, his jutsu could level up.And so, he began walking a very... peculiar ninja path.

Overnight, young Ye Zhen suddenly discovered he had acquired a strange new ability!The meaningless cries of animals and insects in the mountains entering his ears began to sound quite different.“Quick, brother,” squeaked the mouse brothers, “the treasure in the back hill that can make us grow dozens of times in size is about to drop, let's go!”A swarm of mosquitoes buzzed, “Those two guys are here again, brothers, let's get them and have a feast!”A Cloud Winged Young Tiger faced Ye Zhen and let out one fearsome roar after another, “Mommy's not home, don't come any closer, come any closer and I'll eat you!”Everything changed because of this!

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