The supporting character's harem is very normal - Chapter 12: Camouflage skill

Yi Jiamu was a patient with the ‘Ability Deficiency Disorder’ and he inadvertently attracted Gu Yesheng’s attention.

My method in getting stronger is very simple—eating.I just need to eat artifacts.I've regressed, so I'll be able to eat as much as I want now, right?

Riku Aoyama was just a broke, unlucky and starving college dropout waiting for his time and scraping by on instant noodles, and ended up as part-time buddy—until a mysterious vending machine offered him a deal: a system that lets him buy anything.Want a skills? Check.Looking for knowledge? Instantly downloaded.Legendary weapons? Delivered to his door.Authority, time, fate, even the affection of others? All up for sale—if he can pay the price.With the Infinite Wallet System, Riku’s once-pathetic life turns into a wild ride of action, opportunity, and temptation. From unlocking forbidden martial arts to building a harem of powerful women drawn to his rising charisma, Riku is determined to forge an empire, one purchase at a time.But every system has its cost. As he gains power, hidden forces begin to notice his ascent. Gods, demons, and beings beyond reality have started watching—and some want to claim the system for themselves.Action-packed, hilarious, and mature, this is the story of a man who can buy everything—except his own peace of mind.

The flicker and a lonely soul named Ye Zan came to the world that seeks immortality through civilization progress. He thought that he could enlighten everybody, but nowadays people are neglecting it.

The remnant soul even named itself “The lonely soul of Dao Zu’- but still could not find the body that was ready to incarnate it. “Well’ it thought, “ I still have technologies!”.

Do I need to master anything? SO EASY! I could just surf it on the internet.

Do I want to be a genius? SO EASY! I Just need to get some genes of genius.

Do I want to go around the world? SO EASY! I just need to launch my own satellite!

Everything is SO EASY here! -Alchemy, refining, magic symbols, different lifestyles- with the help of technology, they are SO EASY!

Technologies are not a panacea, but technologies can make life better, so Ye Zan decided to put down his roots in this weird place. Science and technology can strengthen the country, science and technology can also strengthen the spirit, Watch the journey of a lonely wandering soul under Ye Zan’s control and witness- what it takes to become a real master of science and technology.

- Description from Novelupdates