Yamato Shintei, a high school student working part-time as a delivery courier, finds himself drawn into a fierce rivalry between Angel Mart and Devil Store, two convenience stores vying for dominance through exclusive collectible stickers. These stickers possess immense cultural and financial worth, classified as high-risk commodities requiring guarded transport—a necessity highlighted by the infamous "300 million Bikkuri-Man sticker" heist.

Angel Mart lures collectors with intricate glitter-based designs, while Devil Store adopts ruthless strategies to undercut its competitor. As tensions escalate, Yamato becomes an unwitting catalyst in the conflict, triggering a sprawling clash that fractures former allies into rival factions. The battle centers on consumer loyalty, collector fervor, and the high-stakes trade of these coveted items, with Yamato navigating the chaos sparked by the stores’ unrelenting competition.