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. (Crunchyroll)