Rescue System is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Kim Soohyuk, a veteran rescuer in Shinil-seo was crushed and killed during a rescue operation in a collapsing building. Soohyuk, who thought he was dead, opened his eyes in an incident 10 years ago. [Save Everyone] He was able to save two people that he couldn't save in the past. As a reward, he was also given new abilities and strength. "Great. From now on, I will save the lives of those I couldn't save in the past!"