Gender-swapped, deceased woman, Akira Shinmura, RCTD-571

The older sister is possessed by her younger brother, and her appearance and personality completely change from the positive to the opposite of the deceased girl! She massages her breasts in front of a full-length mirror and urinates on a man for the first time! She eats instant noodles while having sex with an empty shell! The woman's genitals feel amazing! She returns to normal during possessive sexual acts, but later, her mother is shocked by the incest between her sister and brother! I'm going to use my penis to corrupt my sister!