Mondaiji-tachi ga Isekai kara Kuru Sou desu yo?

Synopsis

As chaos reigns over Salamandra, Black Rabbit uses her authority as Judge Master to put the game on hold and ask both parties to have a meeting. During the meeting, Black Rabbit and the No Names try to confirm the details of the game from Pest, the community leader of the Pied Piper of Hamelin and the game's host, and whether the rules of the game are fair and are being followed due to the game's lack of details and the reason Shiroyasha can't participate in the game even if she wanted to join. Using Black Rabbit's connection to the center of the Garden, they have confirmed that the game doesn't violate any rules and it is fine as it is. While trying to find a schedule to resume the game, Pest reveals that she is spreading pathogens throughout the city to make people ill, threatening the No Names to join their community which is officially called Grim Grimoire of Hamelin if they wanted to live. Izayoi predicted that their enemy is a new community due to their desperation of wanting more manpower, and uses this as a chance to let Black Rabbit participate in the game as well, telling Pest that letting Black Rabbit join the game will give Grim Grimoire of Hamelin a chance to have Black Rabbit in their group if they win the game. Pest agreed to Izayoi's suggestion and made changes in the game's rule. As for resuming the game, they agree to hold it in a week since Izayoi and the others might be dead if they hold it longer than a week, rendering the Grim Grimoire of Hamelin's objective to be in vain. Meanwhile, Asuka is in a dark cave along with the little fairy from Rattenfänger. When she regains consciousness, the lost souls of the 130 children that died in the story of the Pied Piper of Hamelin appeared asking Asuka to help them end the false lore of the Rattenfänger and that they will be giving their gift, Deen to her if she is able to make it submit to her in a game. After 4 days, You and the citizens of Salamandra are feeling the symptoms of the black plague. Izayoi visited You in her room to help her alleviate her boredom. During their conversation, they tried to find out the truth behind the story of the Pied Piper of Hamelin. Izayoi mentioned that in different timeline, lots of things happened in a different way and that there are some things that may stay the same at one point, relating it to the story of the Pied Piper of Hamelin. Izayoi informs You that the story of the Pied Piper of Hamelin that they are facing right now might not be the same Pied Piper of Hamelin that they know, focusing on the black plague being the anomaly in the story since it can't kill the children in the story in a limited time which creates a contradiction. As Izayoi and You, continues to find out the origin of the black plague, Izayoi remembered that Jin said something about the black plague occurring in the 4th century after the "Little Ice Age" due to the weakening of the sun. With Izayoi knowing that Shiroyasha has control over the sun's activity, he is able to find the reason why Shiroyasha can't participate in the game. The reason is that the prerequisite for the game will not be met if Shiroyasha joins the game since the black plague which is a necessary part of the game will not be able to occur when the sun is active. With that cleared, Izayoi and You think of a way to solve the riddle of the game, "break the false lore and expose the true legend". Solving it in a more concrete way, Izayoi remembered the stained glasses depicting the Pied Piper of Hamelin scattered across the town. Following the riddle, they should break all the stained glass except for the one that depicts the true legend behind the Pied Piper. At the day of the game, Izayoi and the others scattered around Salamandra, breaking stained glasses of the false lore. The Grim Grimoire of Hamelin noticed their actions and summoned the town of Hamelin, replacing the city of Salamandra. After the terra formation, the locations of the stained glasses have changed which prompts the No Names to search for churches in Hamelin, hoping to find stained glasses. With the town of Hamelin in place, the Grim Grimoire of Hamelin's power has doubled. Weser, with his divinity activated, tries to take on Izayoi. Black Rabbit and Sandra fight hand in hand against Pest while Jin and the others are fighting against Ratten and the Stroms. As the Stroms tries to get their hands on Jin and the others, Asuka saves them with Deen in her command.

(Source: Wikipedia)