Sign-in to get T-Virus, sign-in to get Haki, sign-in to get magic, sign-in to get ninjutsu. This is a story of a Hao Yun who uses the sign-in system to sign in to the heavens, step by step from ordinary people to superheroes! “Thanos get ready I’ll sign-in to defeat you!!” This is translated novel. Please give it 5 stars review!! Translator site: readfanfic . com P atreon: p atreon.co m/RF_MWZ