A golden anatomical diagram of a tuna fills a black background, with Japanese characters labeling each section of the fish's body in a technical, educational style. Bold yellow lettering reading "マグロの解剖学 TUNA ANATOMY" anchors the bottom of the composition, creating a striking contrast between the precise linework and the dark, sand-textured ground. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.