After 25 years of marriage, the couple's sons have left home and the couple is living alone. They don't have a bad relationship, but they're like air to each other. While cleaning the room, he discovers an old photo album. Looking inside, he finds photos of his wife from her school days. Looking at his wife in her younger days makes his crotch swell, and he is overcome with the desire to have sex with his wife at that time. Perhaps the man's lewd Kokoro has traveled back in time... When he arrives at a new world, he sees his wife in the photo album...