While attending a dinner party that the former Queen is holding, Wolfram insults Yuri's mother by saying she is dirty human and Yuri reacts to the insult by slapping Wolfram across the left cheek. From everyone's weird reaction to the slap he finds out that this is actually how the nobles of the Demon Kingdom propose. Wolfram then throws his silverware on the floor to challenge Yuri to a duel to contest the engagement and Yuri unknowingly accepts by picking up a knife. Yuri is allowed to choose how they fight the duel and so he decides they should fight through a sumo match.

With Morgif now in his possession, Yuri finds out that the sword needs to absorb souls for energy. Jozak tricks Yuri to participating in a gladiator event so he can absorb souls when people die. Yuri is forced into a colosseum fight to the death and when he reaches the field he finds out that his opponent is Rick, the apprentice from the ship they were on.

Yuri goes to see a dolphin show, but when he is called up to the stage to shake hands with a dolphin he is then transported to the other world. After Yuri finds out about an imposter thought to be the Demon King, Yuri plans a trip to save the person, accompanied by Wolfram and Conrad. Along the way they met up with Gwendal. During the trip, they encounter a Sand Bear and Wolfram along with the rest of the soldiers except for Conrad and Gwendal fall into its sand trap. Yuri orders Conrad to rescue Wolfram. Gwendal and Yuri continue on to the country of Svelera. When Gwendal and Yuri stop at a town to gather water and provisions, they are mistaken to be an eloping couple and are chained together. They manage to escape.

A fantasy world calls for a fantasy adventure, and Yuri has decided that he wants to see a dragon. He, Wolfram, Conrad, and Günter set out to the dragon preserve (dragons are an endangered species after all) to find one. Yuri quickly makes friends with one, just in time for some trespassing humans to attack looking to kill and sell a dragon. Unfortunately for Yuri, the group includes a young hero named Alford with a holy sword who decides to use the confusion to try and kill the "evil demon king".

Yuri and co. travel to Switzerland after discovering that Bob is currently staying there. Yuri is shocked when he finds his parents followed him there and they travel together to meet Bob on a bus that was sent to fetch them.

Yuri along with Conrad, Murata, and Wolfram travel back to earth in order to get something Yuri left behind. They are unable to return to their world because of the box removed from Earth and they travel to Switzerland where Bob is to ask for assistance.

A possessed Wolfram offers to give Shori magical power to protect Yuri but before Shori can answer, an unexpected visitor arrives interrupting the conversation.

Shinou praises his handpicked strategist and Wolfram is taken to Blood Pledge and Greta wonders if he had died. Anissina speculates that Wolfram still is alive and plans to freeze his body like Günter's when he was poisoned.

Soushu has successfully taken over Yuri's heart by revealing why he chose him as the Maou—to be his body. Meanwhile, Günter and Dorcacos travel to Morgif's birthplace in order for him to reveal his true powers.