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 the legendary wolf monster Fenrir got attracted to the delicious smell of Mukohda's food and signed the Familiar Contract with him, Mukohda decides to register with the Guild in Fallières his next stop.

Mukohda and his familiars dash through the forest, after strengthening their bonds in the dungeon. However, they soon find themselves in the territory of dangerous monsters and, just like Mukohda expected, surrounded by a pack of orthros...

Lambert consults Mukohda about a gift for his wife. When Mukohda suggests a certain product he purchased from the online grocery, it leads to an unexpected situation. Meanwhile, a pack of dangerous monsters, called wyverns, are approaching the town...?