OIZA-004 Granddaughter's All Grown Up

The family I live with also seems to somehow alienate me, and I feel a sense of alienation every day... At times like that, the kindness of my grandson sinks into my bones. One day... the memories that fly into the old man's mind and the complicated feelings he has for his grandson, who has grown into a fine woman, intersect. After the war, the technique that delighted the prostitutes in the entertainment district now leads the grandchildren to orgasm!