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

Young-yi, a high school goalkeeper promising to lose his arm in a car accident, participates in a clinical trial of SC Bio and receives a medical transplant. Then one day the virus called "mechanism" spreads in the world, and unknown beings begin to chase the spirit. In a moment of crisis, a mysterious woman saves him and eternally tells her the truth of all these moments...