Demon Slayer: Kidnapped by Butterfly Ninja at the Beginning

Introduction: Also known as I don't have a few years to live, so I have no choice but to kill ghosts. Hiirago Himimi, who was reborn in the Demon Slayer World, thought he was lucky. As a result, he was abandoned by his biological parents at birth, and after being adopted by a wealthy family, he contracted an incurable strange disease and could only live until the age of twenty. Therefore, when he was told by the Butterfly Ninja that it was because of ghosts that he suffered all this, Yaju must... His heart of justice beat again in his chest. To kill ghosts, you must kill ghosts! "Let's kill Tongmo together, Miss Butterfly Ninja!" Not long after, a ghost hunter known as a madman spread among the ghosts. He behaves erratically, has strange sword skills, and uses a breathing method that he has never used before. Every ghost he sends to hell has a one-star negative rating. Wu Kuan trembled, "Then if you kill Tong Mo, you can't kill me." "That's not incidental." Note: It is slow to warm up in the early stage, and there is a lot of foreshadowing. The self-created breathing method, the author named it useless, is above.