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...!?

The place Fel decides to bring Mukohda to get some battle experience ends up being a creepy dungeon. Even so, Mukohda gets ready for battle and increases his stats by eating a meal from his original world using the “Online Grocery”. However...