Different Dimensional Red Alert World

He was originally just an ordinary freshman, without any special background, neglected to exercise for many years, and even failed to pass the ordinary physical fitness test in school. But later, he inexplicably obtained the "different dimension system" presented by a mysterious person, and used it to enter the virtual game world of the Red Alert. From an ordinary mobilizer to a monster-level ace, his life has since turned upside down. The change......