JUL-992 A beautiful sister whom I absolutely shouldn't lay a hand on and I are step-siblings without blood ties... After losing the sibling restraint, the two of us indulged in forbidden intercourse during the summer days―. Tosa Ayame

The start of summer, with the sound of cicadas, my sister Ayame and I returned to our childhood home for our mother's 17th memorial service. Every year we return because of Ayame's presence. My kind and admirable sister took care of me in place of our mother who passed away early. Although we are both married, I still have special feelings for my sister that go beyond family. On the night after the memorial service, my father called us with a serious expression and revealed to us that we are not actually siblings…