Demon Slayer: Pirate System, Across the Infinite City!

[Demon Slayer: Kimetsu no Yaiba + Pirate System + Daily + Multiple Heroines + Time Travel + Abstract + Uncle Liu] Lin Yuan traveled through a different world and awakened the [One Piece] system at the beginning. As long as you complete the mission, you can obtain various rewards such as devil fruits, sword skills, three-color Haki, and sharp swords. "Hahaha! Why don't I take off?" "There is only one Pirate King, and that's me!" Lin Yuan laughed arrogantly, only to be slapped in the face the next second! [System mission: Hold hands with Kamado Midouzi once! Reward: Thunder Fruit! "No! Why is the world destroyed by demons!" ... The introduction is weak, please read the text!