The Corrupted Darkness Corps tries to change the history of the past by using the space-time rift that occurred at the Gate of Destruction. Pursuing to stop his ambitions, Mushamaru appears in modern Osaka in the 21st century, transcending time and space. There, Mushamaru, who met the boy Susumu, lived a silly life as Takechamaru!? Den series" reappears in a new edition with all 4 volumes!! Chamaru's mysterious armor robbery strategy!" is included.