Before reading, there are some changes i have made in the story: - Rengoku's family have way more detailed documents about Sun Breathing and Moon Breathing. - Therefore, they also teaches Sun/Moon Breathing to more demon slayers, however, there are none Sun or Moon Hashira from Sengoku Era until Taisho Era. In the Taisho Era, where the story start, there are also a new OC demon slayer: Tsukikuro Kamamura. Welcome to my story.