2 H2O2-I + 2 H2SO4 + K2MnVIO4 MnIISO4 + K2SO4 + 2 O20 + 4 H2O

This is an oxidation-reduction (redox) reaction:

MnVI + 4 e- MnII (reduction)

4 O-I - 4 e- 4 O0 (oxidation)

K2MnO4 is an oxidizing agent, H2O2 is a reducing agent.