After months of grueling training and waiting, Tanjiro was finally ready to get back on the field. He had received his new Nichirin Katana from his Swordsmith Haganezuka during training and now he will finally get to teast it out. Tanjiro and Nezuko were out on a mission, they were hunting a Mantis Demon, the siblings had chased the demon out of a mountain shrine and had cornered the beast into a shed, Tanjiro let Nezuko slay the demon, she killed the monster using Water Breathing Fourth Form:Striking Tide. As they were returning from their mission, Tanjiro and Nezuko heard Aoi crying for help!. The Sound Hashira Tengen Uzui had arrived at the Butterfly Mansion and he was forcefully kidnapping Aoi and Naho. Kiyo and Sumi were crying and begging Tengen to release Aoi and Naho, while Kanao was panicking, her superior was trying to kidnap her friends and Shinobu wasn't there to help!. Kanao was going to toss a coin to decide what to do, but suddenly she remembered Tanjiro's words......to follow her heart,so she unexpectedly stopped Tengen in his tracks, attempting to pull Aoi and Naho free.
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Kiyo and Sumi tried to help Kanao, but they did little more than inconvenience the far more powerful Hashira. " Let them go Tengen!" said Tanjiro. Seeing that Tanjiro had arrived, Tengen quickly let Aoi and Naho go, Tengen had spent the last six months training with Tanjiro, he saw what the young man was capable of and he didn't want to get on his bad side. When Tanjiro asked why he was trying to kidnap the girls, Tengen explained that he needed some Demon Slayers to accompany him on a very important mission. "Well Aoi and Naho are not members of the Demon Slayer Corps so they won't be much help, we will join you instead" said Tanjiro as Zenitsu and Inosuke suddenly appeared, the two had came back from their solo missions and they were ready for more!. As they were leaving the Butterfly Mansion, the four stood behind Tengen waiting for orders, as Zenitsu marveled at Tengen's immense stature, Inosuke impatiently asked where they were going. " The number-one spot in Japan that's dripping with lust and desire. A super flashy place. The Red Light District where demons reside." said Tengen in his usual flamboyant tone.
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Tanjiro and Nezuko were aware of what a red-light district was but Inosuke wasn't which made Zenitsu flustered at his ignorance and naivety."I'm a king! You four are trash! That's the first thing you need to pound into your heads! Drive it in! You're to turn into dogs it i tell you to! Turn into monkeys if i say so! Hunch over and rub your hands together, constantly pander to my every whim and suck up to me with every fiber of your being! And let me repeat I'm a king!" said Tengen, Zenitsu couldn't believe what Tengen was saying, Tanjiro asked Tengen what kingdom he rules over, Tengen answered that he is the king of flashiness and festivals, Inosuke joined in and called himself to king of the mountain, only to confuse Tengen even more and infuriate Zenitsu even more, he was annoyed by their brash confidence. Tengen decided to lead the mission and run ahead, his speed amazed the four Demon Slayers.
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The party had arrived at their destination, and Tanjiro and Nezuko looked on in wonder at everything new and unfamiliar to them. Tengen instructed everyone not to stray, the four immediately left him to look around, angering the Sound Hashira. Tengen explained that they are in the Yoshiwara-Red light District. Inosuke was ecstatic at the numerous people, while Zenitsu became infatuated with the women beckoning him, causing the Hashira to chase after the two to keep them on track. Tengen explained that the district only becomes active at night, making it ideal for a demon to hide in. In a Wisteria House Tengen instructed the four to look for his wife while he gathered intel on the potential demon, Zenitsu angrirly refused to cooperate, believing that the Hashira was sending them out to find a bride for him, only for Tengen to clarify she has been gathering intel as well. When presented with the letters that Tengen's wife had written, Tanjiro believed that she had been undercover for a long time, only for Tengen to correct him by saying he has three wifes, this made Zenitsu lose his mind, making Tengen punch him in announcing at his antics.

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