Different dimension red alert world

He was originally just an ordinary freshman with no special background. He had neglected to exercise for many years and could not even pass the school's ordinary physical fitness test. But later, he inexplicably received a "different-dimensional system" presented by a mysterious person, and used it to enter the virtual game world of Red Alert. He was trained from an ordinary conscript to a monster-level ace. His life has been turned upside down ever since. The change......