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 and Fel arrive at a large lake, where they catch some fish and have their usual meal. But right when they start eating inside the barrier that keeps monsters at bay, a baby slime appears out of nowhere...?

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 But when Mukohda visits the Adventurer’s Guild in the city, he gets notified that his membership was revoked...?

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...?

After easily defeating the pack of dangerous yet powerful wyverns, Mukohda and his familiars receive praise not only from the guild, but also from the entire town. Unfazed by the attention, Mukohda goes out to look for a certain thing that he's always wanted to get in ever since he got summoned to this world.