Tensei Shitara Slime Datta Ken (WN) - Chapter 404

Lin An woke up and found himself in an Eastern Fantasy world.

Ji Nai-tang paid attention to Cen Muqi for 12 years. This secret love had been hidden in his heart. When he finally couldn’t hide it, he sent himself in front of Cen Muqi, pretending to be a pig to eat the tiger and step by step planning to trap the golden thigh.

Ji Nai-tang: It is not that I look good, it is that you make me look good.

Cen Muqi: It turns out that it is important to have a boyfriend who will take pictures.

Ji Nai-tang: But you are not my boyfriend~

Cen Muqi: Can I apply for it?

Ji Nai-tang: What are you applying for?

Cen Muqi: Applying to be your boyfriend!

- Description from Novelupdates

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.

Darkness. The ultimate ruler, the true One-Above-All. Everything starts from it, and everything returns to it eventually. People say that in your final moments, darkness seeps in your very existence, engulfs your whole being. They say it’s an incredibly relaxing feeling that takes you on your journey to your afterlife. They say that in the very darkness, the ‘nothingness’ your weary soul will finally be able to rest and relax. This brings up some very philosophical and existential questions. Do you even exist?

Follow the epic journey of Aiden, the last primal, a unique and ancient race as he finds his place in a strange, new world, filled with threats and violence.