Bishoujo Mangekyou -Tsumi to Batsu no Shoujo-

Yuuma is on leave from school since being hospitalized due to a certain incident. He reunited with his beautiful twin sister Yuuri for the first time in a year and began to live with her, but he had a secret that he could not tell her: he is deeply in love with her. When that secret came to light, love turned to madness and he was assaulted...