Tattoo design that incorporates elements from the anime One Piece, Cowboy Bebop, Great Teacher Onizuka, and Gintama. The tattoo should be located on the forearm and feature a central figure of Monkey D. Luffy from One Piece, surrounded by references to the other anime. The design could include a silhouette of Spike Spiegel from Cowboy Bebop, a speech bubble with a quote from Great Teacher Onizuka, a small image of Gintoki Sakata from Gintama, and background elements such as cherry blossoms, stars, and waves. The elements should be arranged in a cohesive and visually interesting composition. Feel free to modify or add elements to the design based on personal preferences and style. tattoo idea