i became a gynecologist, my perverted sister and double personality brother.

She was bullied by her older sister when she was a child, and her younger brother Bakutaro became distrustful of women. After becoming an adult without any experience of women, Bakutaro succeeded his father's legacy and inherited the Department of Obstetrics and gynecology. Anxiety about whether or not a female patient can be treated, the older sister uses her own body to provide sexual education. But once she knew a woman, Bakutaro gradually expressed another personality and began to embarrass her sister and female patients with dokuhara...