Tsuyoshi Mukouda, an ordinary corporate employee, inadvertently finds himself summoned as a hero to help the Kingdom of Reijseger fight their enemies in a parallel universe. Initially skeptical of the royal family's intentions, Mukouda utilizes his "Online Supermarket" skill to sway them. Though underestimated, his skill proves invaluable as Mukouda cleverly orders Japanese specialty products at a discount to impress the locals. He soon becomes known for his culinary creations, even catching the attention of the powerful Fenrir. Through their travels, Mukouda and Fenrir earn money through trade and exciting exploits, all while indulging in delicious food.