Adult PC Game: Nee x Nee! Docchi ga Suki? Docchi mo!! ~Yasashii Onee-chan to Cool na Onee-chan ni Hasamarete Boku wa Mou!!~ by ANIM Archive

One of the older sisters as mother one of the older sisters as father, protagonist was raised gently and severely. Is the efficacy of two efforts said, protagonist grows up to the that the family trowing is good. However, because he made too much effort, protagonist had become a man who liked older sisters more than just a family for a moment!