I’m Really Scared! is a Manga/Manhwa/Manhua in english language, manhua 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

Going back to the past, with the game world system, and turning everything into a horror game space! Fight against the terrifying darkness with peculiar powers, and finally become a new generation of gods in horror and distortion!