A Fate-Changing Change from the Sign-In System

An ordinary older young man wakes up one day and returns to his 17-year-old life in an instant. When he thought he was just reborn, the classmates he met on campus quietly discovered that the world does not seem simple. Since God has given him a chance, how will he live a different life? What height will it reach with the help of the system? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.