Jokei Kazoku III: Himitsu - The Anime

Plot: Itami Yoshitaka is one of the candidates as successor for a large powerful company. Hashizume Tomoki is charged with convincing the four beautiful young heiresses to relinquish all claim to their father's company and fortune. But Tomoki might have a hidden agenda of his own. (This OVA is based on the erotic game by Silky's.)