Kuno Totono, a curly-haired college student, visits Hiroshima and becomes embroiled in a mystery surrounding the inheritance of the Kariatsumari family's assets, using his intelligence and loquaciousness to unravel the case.

Kuno Totono is a college student with naturally curly hair. He is extremely smart and loves curry, but doesn't have any friends or a girlfriend. Kuno Totono loves to talk and he can often solve difficult problems simply by talking it through. One day, Kuno Totono visits the city of Hiroshima. There, he gets involved with a mystery involving the succession of the Kariatsumari family's property.