In this novel, the protagonist, Shikura Fuyayoru, is transported to modern-day Tokyo and awakens a system that allows him to enter a twisted version of "apocalypse game"副本. He also gains two special abilities: 1. Time Rewind (10 times a day for 30 seconds each), and 2. A mysterious talent that enhances his physical abilities by learning new skills. He aims to grow stronger and eventually amaze the world. However, he soon discovers that the real world isn't as simple as it seems.