Kimihiro Watanuki is haunted by spirits–and the only way to escape his curse is to become the indentured servant of the mysterious witch, Yûko Ichihara. But when his beloved, beautiful Himawari-chan, asks him for a favor, he and his eternal rival, the exorcist Dômeki, must go on a spirit-busting adventure without Yûko there to save them!

Meanwhile Yûko gives a young woman a precious cylindrical box from her treasure room. There’s just one caveat: She must never open it. Inside is a magical device with a terrifying reputation! Can Kimihiro save an ambitious young lady from her own overconfidence?