Aitakute, Shima Kousaku

Kotaro Tani, a crazy job-hunting student, reveres the "Shima Kosaku" series as a holy book and has read it over 1,000 times since he was a child. One day, I suddenly realized that I had been reincarnated into a world where the island cultivation I had always dreamed of actually existed! Tani is filled with anticipation, but what awaits him as his boss is Terutsune Konno, the most evil "child villain of the series"! Will he be able to survive the turbulent 1980s filled with power harassment and meet Kosaku Shima? (from mangadex)