[Chinese]OYC-243 I'm being kept by my little sister.

This is the home of my older brother who lives alone. My brother returns from work. My sister says 'welcome back' and shows her face. As we eat dinner together, my brother gets a phone call. He's going to have a small reunion with a female friend he has feelings for. Seeing this, my sister becomes irritated... My sister puts drugs in the post-dinner tea and makes my brother drink it... He then loses consciousness. When he wakes up, he finds himself restrained to a chair, and my sister says 'I should have done this from the beginning...'. My sister plays with my brother who can't move. After that, she has sex with him using his penis over and over!