One day, Tsuyoshi Mukohda, an extremely ordinary salaryman, gets caught up in a hero summons being performed in another world. At the time of his summoning, he receives a unique skill known as "Online Grocery", that allows him to bring food ingredients and seasonings from his original world. Even though this skill seems plain at first glance, the food he brings into this new world has an absurd effect...!?

After registering with both the Merchant's and the Adventurer's Guilds, Mukohda immediately decides to take on a beginner’s quest. However, when they deliver the monsters that Fel caught during their quest to the Guild, they find out that most of these monsters are B-rank or higher.

Mukohda and his familiars receive a request to head towards a mine and hunt down the metal lizard that inhabits it. Instead, they run into a rare mithril lizard. After Mukohda defeats the lizard, with the help of Fel and Sui, Fel turns his interest towards a different and tastier prey...?