In the year 20XX, a young boy named Netto Hikari receives a very special gift upon entering the 5th grade: his own customized Net Navi, Rockman. Despite Rockman's small size and more responsible personality, the two quickly become best friends. A Net Navi is designed to guide its operator from within their PErsonal Terminal, or PET for short. Both children and adults enjoy friendly "Net Battles," where they pit their navis against each other to prove their worth.