乙女はお姉さまに恋してる 三つのきら星 The Animation

Hisoka was taken in by Yukitaka, who runs the global Jinsei Corporation, and raised for one purpose: to serve Orihime, the daughter who will inherit it. When Yukitaka asks him to enroll at Orihime's school and guard her without her knowing, Hisoka agrees before hearing the catch, because Saint Ceral Girls' Academy admits no boys. This single OVA adapts Caramel Box's third Otoboku visual novel, so it sets up the disguise and the household around Yukitaka's aide Daisuke rather than working through the game's routes.