Dokkoida!? (2003)

A comedic Japanese novel series about a boy, Suzuo Sakurazaki, who is hired by a preteen space alien girl, Tanpopo, to try out an experimental new suit developed by the intergalactic toy company that she works for. Suzuo agrees to work for her since he is unemployed and needs the job to pay the rent. The suit gives him super powers, with which he fights bad guys and people from rival intergalactic toy companies and organizations.