Don't call it mystery, 3

For several generations, the Kariatsumari family has been fighting over a huge inheritance and, as tradition dictates, it always ends with the death of a victim. Shioji, one of the candidates for her inheritance, has asked Totono Kuno, a very insightful young detective, to accompany her to the official opening of the dispute over her grandfather's inheritance. In total there are four cousins, but only one can inherit all that immense fortune. A deadly game that will make Totono leave his comfort zone while he puts his life at risk...