Onepiecexdemonslayer Histórias

In the world of One Piece, four heroic individuals from different worlds, Izuku Midoriya, Tanjiro Kamado, Natsu Dragneel, and a Lucario named Ricky Steel. They were somehow brought to this world and are looking for a way back. In order to do so, they need to venture into the Grand Line. During their quest, they meet up with the Straw Hat Pirates and work together with them. Join these four in their quest of a lifetime through the world of One Piece

YANDERE! One piece x Demon slayer !demon fem reader They thought they had defeated Muzan. They thought the nightmare was over. But now, Y/N, Tanjiro, and Nezuko are in a world where there are no sun-like breathing techniques, no Demon Slayer Corps - only an endless ocean and those who want to kill them or use them. Y/N is no longer just a sister... here, she is a threat. And Tanjiro will have to decide: to protect his sisters at any cost.

Over 100 years had passed since the battle against Muzan Kibutsuji. All the participants that fought in that gruesome war had all passed away during a time of peace from a world without demons. Yet, one from that time is still around. Yushiro, a demon boy created by Lady Tamayo, is at his home painting portraits of her so that he can remember her forever. He wanted to end it all, but Tanjiro told him that he should live on to keep her memory alive. In all of these years, new world powers took over. Marines and Pirates. Marines were supposed to be the good guys and Pirates the bad ones. Yushiro, of course, didn't want anything to do with either of them, but can he really keep his life peaceful even in this Pirate Era?