Two receivers receive a service. The pass is caught, and the roles rotate: the receiver becomes the catcher, the catcher becomes the server, and the server becomes the reserve.
Ensure that the pass remains on their own side and is at least one meter from the net.
Extension
The catcher provides a set-up which is then hit.
Variation
Two receivers receive a service again. After the service, the server quickly stands somewhere in the field.
After the pass is made, the passer looks where the server is standing. A set-up and attack follow, aimed at the server.
Roles rotate as follows: the server becomes the reserve receiver, the receiver who attacked becomes the setter, and the setter becomes the server.