The day before he begins attending high school, Ashiya Hanae becomes possessed by a strange fuzzy yokai. Being possessed causes him to fall ill, and while spending the start of his high school life repeatedly making trips to the nurse's office, he comes across the contact information of the Mononokean, which specializes in exorcising yokai, and decides to call them. When Ashiya finally visits the Mononokean, he meets the morose master Abeno Haruitsuki.
Will I still be alive in ten days?
Ob ich in zehn Tagen noch am Leben bin?
¿Sobreviviré a estos diez días?
Ainda estarei vivo em dez dias?