Meeting with various peoples, various magic training… the now developed Rudeus is setting on a really harsh and cruel journey, such as Teleportation Incident involving his hometown, Fittoa Region, and other various tales. After prevailing many hardships and successfully coming home, Rudeus became one with her beloved Eris. However, the very next morning, Rudeus suffered a heavy shock after realising the sudden disappearance of Eris. He had given up on everything and reverted to his shut-in and NEET self, just like the previous world. Alas, as the only lost person in his family caused by Teleportation Incident, his mother, Zenith has not been found yet. Now he is determined to find Zenith, and Rudeus is standing up on his legs once more.