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.

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 asks Fel to teach him how to use magic after witnessing his wind magic. However, when things do not seem to go well, Fel decides to start a Spartan training regimen for him.

After Mukohda rescues a traveling caravan from a band of bandits, they set out together for the great city of Karelina. But when Mukohda visits the Adventurer’s Guild in the city, he gets notified that his membership was revoked...?