The wife's elder sister came to help out due to the wife's hospitalization. Reika, who is my sister-in-law, is beautiful and kind-hearted with a caring nature. She does so much for me, her only brother-in-law, that we become intimate. Even though she is someone else's wife… I end up having intense, illicit affairs with my sister-in-law during my wife's absence! I indulge in forbidden pleasures that must never be found out and ultimately fall into depravity!
