Come back to us( Demon Tanjiro)

In the infinity castle~

After " kidnapping " Tanjiro, Muzan tied him up with chains and proceeded to have a meeting with the upper moon demons.

"Muzan-sama, why did you invite us here for?" Kokushibo upper moon 1 asked politely. Muzan than old them happened and that he wanted to turn Tanjiro to a demon. All the demons nodded their head showing that they agreed it was a good choice too choose a sun breather to become a demon. After that meeting, they all had another role instead of just killing humans and eating them. They had to not let Tanjiro escape the infinity castle if he was still human. Well, Muzan wanted torture him for a while before making him into a demon.(Which is sad...)"Now, time to check on that brat." Muzan softly talked to himself as he went to his dungeon. Tanjiro was still knocked out. Muzan just sat there and stared at the boy starting to get irritated. He kicked Tanjiro trying to wake the boy up. It did work. As Tanjiro's eyes opened slowly as he moaned from the kick. When Tanjiro remembered what happened, he tried to stand up. But the dangling of chains made him realize that he was chained up. Tanjiro looked p and saw Muzan's two red beaming eyes facing him. His eyes widened as he was shocked by the sudden appearance of Muzan, the demon lord, right in front of him. After a few seconds, Tanjiro mustered up the courage and started speaking with a shaky voice" Let. Me. Go." Muzan just simply chuckled and kicked Tanjiro so hard in the stomach that he coughed out blood. Muzan somehow enjoyed the sight of that and kept on kicking him real hard. Tanjiro started coughing up a pool of blood and screamed every time Muzan kicked him. Even to his face! Cruel! Tanjiro tried to endure it and obviously failed. He ended up crying and begging to Muzan to stop. But....Muzan does not stop. He keeps on kicking and kicking. Being chained to a pole and continuously kicked for hours was tiring. At the end, Muzan got bored and started cutting Tanjiro with his sharp nails. Blood oozed out of Tanjiro's wound as tears rolled down his cheeks. Muzan kept going and was waiting for something. Some words came out of Tanjiro's mouth  with a weak voice. "Please....s...stop. I...I will d...do anything!" Those words were soft but Muzan heard it clearly. "Anything?" Tanjiro slowly nodded. Muzan was satisfied. He unlocked the chains and Tanjiro fell with the support of his hands on the wooden floor. Muzan looked at Tanjiro's lifeless eyes and smiled. Muzan cut his arm as blood dripped out. He held Tanjiro's chin and made him drink the blood. After that, Tanjiro started moaning as a red mark covered his burn mark on his forehead. Fangs started growing out of his mouth and his nails grew sharp and long. Tanjiro could manage the blood given to him. His wounds slowly healed and he stood up with his head hung low. Muzan  was as happy as a lark. He was about to say something but ...SPLAT! Muzan was in bits and on the floor. He started turning to dust. Muzan died? He was killed by Tanjiro that was now......the DEMON KING!

To be continued,