Koushi Aketa (Mukoda) is summoned from modern-day Japan to a world of swords and magic. Expecting a grand adventure, he finds himself a bystander in a "hero summoning" ritual! Compared to the three true heroes, Mukoda's initial abilities are incredibly low. Sensing that the kingdom is exploiting the heroes, Mukoda leaves the castle. His only reliable asset in this new world is his innate skill, 'Online Convenience Store,' which allows him to receive modern goods. While unsuitable for combat, this skill ensures his survival. However, Mukoda's easygoing approach soon leads to unexpected discoveries...