Chapter 1: The truth that Muzan knows that Tanjiro doesn't know. Upon finding out the truth, Tanjiro decides to turn and attack The Demon Slayers. Meanwhile, he falls in love with his creator. Muzan. What will happen? Chapter 2: Years after they last saw each other, things have changed. One is being hunted by his visions while the other is trying to save him from his darkness. As two fates intertwined, a new demon has arrived and he is here, for Tanjiro. Trying to claim him, but in the midst of doing so, Tanjiro discovers an even greater truth. What could that be? Chapter 3: Waver between Goals and Love for Truth. Things changes as time goes by, what is real and what is fake lies with his own desires. All these while, in the midst of searching for answers...He meets the people in his past life. Even the one who he wants to find. How will their new lives intertwined? Will Tanjiro stay clear of his goals? Or will he fall to his kneels in front of the being he is trying to spy? Find out more on his journey of truth! [This story contains shipping and some touchy moments]

muzan visits earlier then expected for the kamados and ended up with a child to raise

Rui had everything in a family , a mother , a father , even siblings. But Rui wanted one more thing and after thinking about the one last thing he needed. He finally realized he needed a lover , so when Tanjirou came into the mountain Rui thought he was perfect to be his lover.

As mentioned in the title male reader is sent into the black butler world and is ready to have some crazy adventures. May contain boy x boy which it will *wink*. Its a first so please go easy! Also available on my quotev account by the same name. Don't forget to vote and comment for support💜