A girl who reincarnated from modern Japan to another world became the strongest witch after hundreds of years of diligent study. Craving the taste of her hometown, she activates a return magic to Japan, but due to a calculation mistake (?), she arrives not in the modern era, but in the Sengoku period, where warlords rival for power...!? The time is the Warring States period. But there is magic, and there is romance. The Sengoku fantasy filled with misunderstandings, unleashed by a witch returned from another world, begins!