A Hero Who Does Everything Perfectly summary:

In 2024, Na Gang-in wakes up in the heart of South Korea. He can't remember who he is or where he is, but through a combat support AI named Jeon Ji-in embedded in his body, he discovers he's affiliated with the Earth Alliance from 2082. To regain his memories and figure out why he ended up here, he needs to gather information… With nothing to his name but plenty of skills, this is Na Gang-in's clumsy journey of adapting to Earth!