MTL - Dawn of the Grey Tower - Chapter 42 Exchange (below)

This is the story of a young man who was reincarnated as a dragon with a near-insatiable curiosity. Initially sparked by questioning his own reincarnation, he quickly gets lost in the endless world of magic, using his deep understanding of advanced sciences to learn the laws and properties of a new type of energy known as mana.However, soon enough, the table would flip, and he would begin using that very same energy to expand his knowledge of science, to the point that he would begin questioning his own understanding of the world.Although not his original intention, with the combination of his intelligence, expanding curiosity, and the 'miracles' that occurred to allow for his existence, he quickly found himself climbing the mountain of strength as if it were a small hill before eventually climbing to a point where it seemed as if he himself was the peak itself.Even if.. that was never the case...There is mild gore, and profanity is 'censored' toward the beginning, but not later in the story.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

Makoto Kenji, an overworked underpaid loser, was suddenly transported to another world along with a few of his co-workers.arriving in the new world. they were brought to save the world from the onslaught of the demon king.but while assessing their prowess, they realized that Kenji was an animal tamer, one lesser than a beast tsmer and could only tame dogs and cats and occasionally a few birds.eventually, Kenji was kicked out, though, he was kicked out with a lot of gold on him, so he could easily get by.Eventually once more, Kenji was able to create a life for himself with his regular cooking skills which were like greatness in this world.for the regular dish of rice and curry was powerful enough to make the people of this world increase their rank levels. ( Under classes, there are ranks, and under ranks, there are six levels)But even with the fame and money he gad acquired, Kenji eventually got bored and decided to become an adventurer!but on his first quest, something happened to him. something that would change his entire life and the faith of this world.