MTL - Lord of the Mysteries - v6 Chapter 44 messenger

The Mad Cultivator follows the tale of Ye Kong, a rude and vulgar thug from modern day China. While collecting protection fees, he was sent to another world! By the time he realized what was going on, he was possessing the body of an idiot. Watch as Ye Kong struggles against fate to climb the road to immortality!

- Description from Novelupdates

When we met for the first time in our first year of high school, he saw my contempt, but silently continued to clean;

[Trait: Protagonist's Desire][Acquire one trait possessed by the protagonist you reincarnate into.]A killer physique, a hypnosis app, becoming a shota...The protagonist has gained the ability to reincarnate into characters from adult games and make their traits his own. NO NTRRomance | Fantasy | Harem | Multiverse | SMUT | R18 | Reincarnation | NTL

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.