Human Bartender Is TRAPPED In A Monster Dungeon, But His Drinks Become OVERPOWERED

What the story is about

Reincarnated bartender Ivan runs a tavern deep inside a monster-filled dungeon, where magical drinks, food, and steady improvements turn his small business into a popular gathering spot. Though Ivan sees himself as a weak beginner mage focused on serving customers, powerful monsters and human authorities mistake his unusual connections and luck for evidence of overwhelming power.