One piece: Scared Luffy

Once through the Pirates, Lucy became the son of Monkey D Dragon, a grandfather named Monkey D Garp, and an unreliable and neurotic younger brother named Luffy. Fortunately, the ghost back system is activated! The completion of the ghost back is 10%, and the training effect is increased by 100 times! The completion of the ghost back is 20%, and the training effect is increased by 1000 times! ... One day, Lucy, a ghost-backed master, appeared in front of Luffy who was shouting to go to sea, and made Luffy cry on the spot. Luffy: "The pirates in the sea are all monsters like my brother? I don't want to go out to sea!" Garp: "For a long time, the two boys, Long and Luffy, with small arms and calves, I really doubt that they are not my sons and grandsons. Like Lucy , they are the grandsons of the old man!" Warring States: "The strongest pirate in the sea, land and air is Prime whitebeard ? No, it's Lucy " . And Luffy is even stronger then Lucy due to God fruit that can Rival Imu .