Kumi Honamanuma has moved to Kyoto to take over her grandmother’s candy shop. She expects to find an empty store, but instead three pretty girls, Harami, K, and Mai, are living there with their dog. Then a young girl with black hair and a backpack comes to the candy shop. She’s timid and frail-looking, but she’s actually Valvaran, the beautiful and terrible demon overlord from the fantasy world. She’s lost her power, and now become an 11 year old girl named Ran. When she was reincarnated, fragments of her power scattered all over the world, and now they’re causing strange things to happen. She tells the heroes that she wants their help to solve these problems.