Sister-in-law raped

Natsumi's husband Kenichi's securities company goes bankrupt, and she ends up living with Kenichi's younger brother Yusaku. Kenichi is arrested just as he is about to give up his flashy life and start a new life. Her brother-in-law, Yusaku, starts to mess with Natsumi, who is confused. Since childhood, he has loved his older brother, and most of his inheritance has gone to him... The target of this hatred was directed at Natsumi. Days of being tied up and raped so that I can't move. What will be the fate of Natsumi, who has been rented out as a sex slave? ?