Rpg fantasy world

In a world where before graduation students touch a crystal ball to receive a class until one day the reader wakes up after dying in their world just to live a few days in their new body until it is the day after the reader touches the crystal ball the ball lights up and the reader is surrounded in a aura where there is any choice of class that the reader can pick from and after picking a class the reader receives a treasure map system that leads them to a item for the class of the reader amd the reader can choose to be intimate with characters or not