Turbomachine and turbomachine stage

A turbomachine stage comprising:

• guide vanes;
• a radially outer guide vane airfoil platform defining with the guide vanes a guide vane cascade, the radially outer guide vane airfoil platform having a guide vane cascade region and a guide vane gap region extending axially beyond the guide vane cascade region;
• rotor blades;
• a radially outer rotor vane airfoil platform defining with the rotor blades a rotor blade cascade, the radially outer rotor vane airfoil platform having a rotor vane cascade region and a rotor vane gap region extending axially beyond the rotor vane cascade region;
• the rotor blade cascade being adjacent to the guide vane cascade, the guide vane gap region and the rotor vane gap region at least one of radially and axially defining an axial gap extending axially between the guide vane cascade and the rotor blade cascade;
• a contour of at least one of the guide vane gap region and the rotor vane gap region varying in at least one of the radial and the axial direction around a circumference, and an at least one of axially and radially opposite contour of the other of the guide vane gap region and the rotor vane gap region varying around the circumference.