Madochonggyeok: Gangcheorui Sniper

Republic of Korea Special Forces, Kang Yi-Chan. During the mission, he faced enemies to save his comrades and was isolated alone in the operational area of the mission. It had been several days since he had faced the enemy without being able to sleep and waiting for rescue to come for him… but in the end, he saw the bazooka flying over the hill, he realized that it was the end of his life and then fainted… When he regained consciousness and opened his eyes, he found himself in a trance, alone in a strange world.

(Source: KakaoPage, translated)