"when the huge external world collapses, people can only find a way to survive in their own small world. Naoko and Kenji closed themselves in their own small world, accompanied by the natural physical relationship between men and women, as if thrown into a universe where they could not lie, with pleasure and revealing the characteristics that people originally had. It seems that only by sneaking into this small universe can people be really strong. "Naoko, who is about to welcome his wedding ten days later, will be reunited with his former lover Kenji, who has returned to his hometown of Akita. Naoko pulled out a photo album of black-and-white photos of her and Kenji intertwined naked from the items she had sorted out for a new life, and awakened the youth she had spent in obedience to desire and instinct. "just for tonight, shall we go back to the past? "within five days of Naoko's fiance's return, what scenery will the two of them see at the end of the pleasant memories and entanglements depicted in the flesh? Combined with the background of the earthquake, the thick sex covered by indifference is like a volcano about to erupt, bursting out twisted but pure, resolute and beautiful magma of life.