Sister-in-law raped

Mr. and Mrs. Kawakami returned home from their honeymoon after having a wedding just the two of them. Husband Ginji and wife Yuu are getting close to each other in their new love nest, and Ginji's younger brother Kousuke peeks in on them. One day, Yu notices that all her used sanitary products are gone. ``Give it back to me, you pervert!'' Kousuke forcefully restrains Yuu, who comes to replace him, and rapes him. Taking advantage of the fact that Ginji is away on a business trip, he humiliates Yuu as if she were his own sex slave...