High school student Rakurou Hizutome has a unique passion for diving into poorly designed video games, relishing their flaws and bugs. Known as Sunraku in the gaming world, he embraces his next adventure in the widely acclaimed virtual reality game Shangri-La Frontier, opting to sell off most of his initial gear for a financial boost, donning only boxers, a bird mask, and essential weapons. Immersed in the game, Rakurou diligently levels up his character but soon faces daunting challenges against formidable monsters, realizing the underestimated depth of this mainstream game. Drawing on his unconventional gaming background, Rakurou adapts and thrives, captivating Shangri-La Frontier with his quirky tactics and gameplay style.