Aoki, a high school teacher was raised under very strict environment by his spartan mother which made him how he is now ..disinterested about troublesome stuffs. After getting lectured by a senior teacher, he went to the infirmary to check on the said student, Kasai who has been skipping class & losing his grades.... where he had his first real conversation with the eerily perceptive school nurse, Tengoku Manabu who is the type of person he always avoids.. who's eye see through his hidden desires & self which he himself doesn't know..?
Oni to Tengoku