for archive purpose. good premise. support author https://www.pixiv.net/en/artworks/133097172
This is a fan-made parody story of Demon Slayer: Kimetsu no Yaiba. The story begins in the Flower District arc. The Sound Hashira struggled to pinpoint the location of Upper Moon Daji, who had skillfully managed to conceal herself. Hearing rumors in the town that a lesbian serial rapist was among the courtesans, Tenzen devised a plan. Tenji believed the lesbian serial rapist courtesan was Daki, but since the Demon Slayer Corps arrived in town, Daki's presence had faded and the assaults had decreased. So Tenji devised a plan: since his fellow male Demon Slayer Corps members volunteered to come to the pleasure quarter with him, he would dress them in women's clothing and pass them off as courtesans.
Tanjiro and Zenitsu's cross-dressing makeup didn't go well. Lacking the charm to attract Daji, they looked awkward and embarrassed. However, when they saw Inosuke's appearance, they wore expressions of surprise and shock. Their usually rough and tomboyish friend Inosuke now looked like a beautiful courtesan. Inosuke had always possessed a naturally beautiful, feminine face, but the combination of the blue furisode kimono, natural makeup, and pink lipstick made him appear even more alluring and feminine. When Tenzen entered the room, he informed the young Demon Slayer Corps members that it was time to begin their first night as courtesans. Tenzen was particularly impressed by Inosuke's beauty, stating that the success of this mission depended on Inosuke's performance as a courtesan.
Inosuke awaits his first client on his maiden night. Though initially impatient, he realizes the mission's importance and sees it as a chance to climb higher in Tanjiro's rankings, committing himself earnestly. His first client arrives, but unfortunately, it's not the Upper Moon Six demon Dakki—just a creepy, overweight old man. The old man approaches Inosuke with a nervous expression, leaning forward to pull Inosuke's face toward his own. The old man reached out to kiss him, but Inosuke grew irritated and flew into a rage. He punched the old man in the face, knocking him to the floor. Inosuke sternly warned the old man not to let himself be used like that. Sensing danger, the old man fled.
When Tengen learned of this, he flew into a rage at Inosuke. He tells Inosuke he should take his work as a courtesan seriously. Spouting such abuse will draw suspicion, making it impossible to locate the Upper Moon Six, the old witch. Inosuke tries to argue back, but ultimately gives in. There's no choice but to carry out the mission. Tengen tells Inosuke that customers in the pleasure district usually don't go too far with sexual acts. Tengen tells Inosuke that once the mission is complete, he can forget everything that happened in the pleasure district. For a powerful Demon Slayer Corps member like Inosuke, it shouldn't have much effect. But Inosuke had no way of knowing it would actually have a profound impact. Because Inosuke knew nothing of sex or sensual feelings. And all these new emotions would be taught to him by an ugly, fat old man.
The next night, the same ugly, fat old man returned. Inosuke was unsettled but tried to remain calm for the sake of his mission. The old man nervously reached out to kiss him again, and Inosuke finally accepted the kiss. For Inosuke, who didn't even know what a kiss was, it was a strange sensation. His first kiss from a stranger. The old man laid Inosuke on the floor, stripped him, exposed his nipples, fondled his chest, and began licking his nipples. Inosuke felt waves of intense sexual pleasure unlike anything he'd ever experienced. For Inosuke, who had never known weakness in his life and had always been in a position of dominance, it felt utterly foreign. Being placed in such a sexually submissive position was an unknown experience for the young Inosuke.
Soon, the old man exposed Inosuke's penis as well. Inosuke had been worried since arriving in the pleasure quarter, as he had only encountered female courtesans, never male ones. He feared the old man would be disappointed and leave once he discovered Inosuke was a man. In reality, the old man knew Inosuke was male and eagerly sucked his penis. Inosuke felt pleasure unlike anything he had ever known before. He climaxed from the old man's vigorous fellatio, ejaculating deep into his throat. The old man then exposed his own penis and compared it to Inosuke's. The old man's penis was vastly larger than Inosuke's. Inosuke was startled and grew tense, wondering what would happen next. The old man grabbed both penises and began rubbing them together.
Just like during fellatio, Inosuke felt an indescribable pleasure, climaxing twice from just a brief rubbing. Afterwards, the old man guided Inosuke to the main event. The two were heading towards raw anal sex. Inosuke didn't even know what sex was, yet in this moment, he was about to offer his virginity to the old man. After raw anal sex with the old man, Inosuke's life was permanently altered. This new sensation would remain in his heart forever, continuing to influence his decisions. The next day, the old man presented Inosuke with sexy lingerie, and he reluctantly wore it for the night. On his second day as a courtesan, he faced sex once more. The following day, Inosuke went to the hot springs to relax. He tried to think about his sword training, but thoughts of sex with the old man wouldn't leave his mind. He indulged in masturbation in the hot springs and climaxed.
Unbeknownst to Inosuke, Zenitsu had slipped into the bath while he was masturbating and witnessed the entire scene. Overcome with embarrassment, Inosuke rushed toward Zenitsu and began chasing him again. Tanjiro watched this unfold while enjoying time with his companions. But the story isn't over yet. The Upper Moon Rabbit remains unfound, and other clients await Inosuke.