Ran, a recluse, is sexually abused by her brother-in-law on a daily basis. ``Ran-chan can't go out, so I'll go shopping for you.'' My older brother, who is kind to me with a sly smile, always asks for something in return. "I'm going to run an errand for you, so please make your dick feel good..." The older brother rubs his hard crotch against Ran and gets excited. I'm going to stay in the room and beg you until I make you cum. Everything becomes a hassle and I can't accept my brother's requests. However, my brother-in-law's sexual desire gradually goes out of control...