"When the huge outside world collapses, people can only seek ways to survive in their own little world. Naoko and Kenji will close themselves in their own little world, and with the natural physical relationship between men and women, they seem to be thrown into a universe that cannot lie, where there is pleasure and people's original characteristics are revealed. It seems that only by diving into this small universe can people show their true strength"─Original author Kazufumi Shiraishi Naoko, who is about to have her wedding in ten days, reunites with her former lover Kenji who has returned to his hometown of Akita. Naoko found a photo album from the items she sorted out to welcome her new life. The album contains black and white photos of her and Kenji entangled naked; the youth time spent together in the past in accordance with the instinct of desire is awakened. "Just tonight, let's go back to the past, okay?" In the five days after Naoko's fiancé returns, what scenery will the two see at the end of the pleasant memories and entanglements engraved in the flesh? Combined with the background of earthquake disaster, the dense sex wrapped in the indifferent daily life is like a volcano about to erupt, bursting out twisted but pure, resolute and beautiful magma of life.