Imouto Shiyoujo

Puni-Soft's second title! His little sister decides to live with the main character in order to go to school. He moved out of a studio apartment, and they began living together. While pressing forward with his younger sister, who loves her Onii-chan, Onii-chan is gradually drawn to her even though she's his real little sister. A siblings' forbidden love story... How will he love her still youthful body and mind? -MTL'd from DLSite