HUNTA-283 “To draw a realistic erect dick!” My sister is an erotic manga artist. However, she seems to know nothing about men’s bodies and always leaves them to her assistant. But even that assistant is a virgin, so I get called to my sister’s apartment s

The erotic cartoonist’s older sister doesn’t know the man’s body, so she leaves the man’s body to her assistant. However, the assistant is only a virgin! So I used the body of my brother who was called to my sister’s work apartment as a reference! “I need it to draw a realistic erection!” I want to see you fuck me!” and all the assistants! !