One Piece: I Can't Believe I'm the Nine-Tailed Jinchuriki

Lucci walked toward the badly wounded Lien. “Anyone who opposes the World Government dies!” In Lien's mind, he stood before a gigantic sealed door. A colossal beast lurked behind it. “You really are useless, kid.” “I'll lend you my power!” Lien didn't have Naruto's gift for talking people around, so he could only tame the beast with brute force. Step one: find a powerful Devil Fruit. He took a bite of the Gum-Gum Fruit and spat it out. Lien thought it must be a bad reaction to the local food. No, maybe he just needed to try a different flavor. But the second fruit was the same. At last, Lien realized something was wrong. “Kurama, was this your doing?” “So what if it was? You can't rely on that weird fruit. No way!” “Ahhh! Do you know what I missed out on?” After countless hardships, Lien finally managed to eat the Pet-Pet Fruit. “Kurama, put on the collar and be my pet!” “Damn it! I can't believe I'd be brought down by something like this...” One day, Kurama crushed the collar around his neck, leaving Lien stunned. “How can you resist the power of a Devil Fruit?” “Abilities don't work against overwhelming Haki!” Years later, Lien looked at the bounty poster listing a reward of five billion berries and smiled. “I really am the strongest!” Kurama grumbled, “You'd be dead without me.” “Right!” “Little Kyu, we're the strongest!” Kurama smiled with satisfaction.