Kage no Jitsuryokusha ni Naritakute
Kage no Jitsuryokusha ni Naritakute is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Kage no Jitsuryokusha ni Naritakute chapters on https://mangabtt.com, fastest updating comic site. The Summary is
Just like how everyone adored heroes in their childhood, a certain young man adored those powers hidden in shadows. Ninjas, rogues, shadowy mentor types, that sort of deal. After hiding his strength and living the mediocre life of a NPC by day while undergoing frenzied training by night, he finally reincarnates into a different world and gains ultimate power. The young man who is only pretending to be a power in the shadows... his subordinates who took him more seriously than he expected... and a giant organization in the shadows that gets accidentally trampled...