Kanojo no Imouto to Kiss wo Shita.
カノジョの妹とキスをした。
After a month of dating, the protagonist holds hands with Haruka, his first-ever girlfriend. On the same day, his parents remarry, introducing him to Shigure, his new step-sister. Shigure closely resembles Haruka, as they are twin sisters who were separated due to family circumstances.
