Original Title: お兄ちゃん大好き！
Developer: Tanuki Soft
Publisher: Tanuki Soft
Released Date: 2017-07-28
“Osamu was born a siscon. He has taken care of his imouto Rio from the moment she was born, as well as his imouto Mio since she joined his family from his father’s remarriage. Every day he was on cloud nine being together with his two imoutos.
Finally came the day when they started attending the nearby school that he also went to. When he saw them in their school uniforms for the first time, his heart started beating faster as he gazed upon their slightly matured figures. Could it be love? Yes, he had begun to have a (sexual) affection for them.”