Tenchi Muyo! War on Geminar

Young Kenshi Masaki was taken from his home planet, transported to a distant galaxy, and captured by a gorgeous princess! This royal beauty claims Kenshi as her personal servant--and lends him out to all the lecherous ladies at her prestigious boarding school. When Kenshi doesn't have his hands full with a curvaceous coed, he can be found training for a looming intergalactic mecha battle.