Sei Yariman Sisters Pakopako Nikki

Based on the adult PC game by Orc Soft, this title follows Kenta, who returns to his former house after five years. His uncle's family now resides there, and Kenta is to live with them again while attending a nearby school. This situation leads to a reunion with his older twin cousins, Saki and Maki, who once cared for him in his youth. He discovers, however, that they have matured into notably outgoing young women. The circumstance changes when Kenta learns his uncle has been transferred to another city, leaving only the three of them in the household. Saki and Maki promptly begin to approach him with considerable aggression. (Source: VNDB)