A demon king has appeared in a neighboring kingdom and the king has to figure out how to deal with it. Meanwhile, Saitou makes a mistake which sets off a trap that sends him to one of the lower levels of the dungeon.

Adventurers from all over the kingdom flock to the new area that Saitou discovered. Saitou wants to go and investigate the curiosity that first lead to the discovery. Meanwhile, the king orders his allies to retrieve a hidden treasure from the new area.

Kisurugi and his demon allies swoop down on Saitou and the others once again! Kisurugi has been assassinating the strongest adventurers in order to obtain the hidden treasure of a mage who can control time, but his reasons aren’t what anyone expects.

Morlock has magically stopped time, but he's completely forgotten what he's supposed to be doing! However, Saitou has anticipated even that! Then, just as Morlock is about to attack, someone else's memories flood into him.

Saitou and the others have returned to their everyday lives. Then, one day, Lafanpan takes a bath in a mysteriously pattered cup and something completely unexpected happens.