After his parents divorced and Akira was taken in by his father, he eagerly awaited the next Sunday. This was because Sunday was the day he could be reunited with his mother, Kyoka, who had been living far away for a long time. And on that very day, Kyoka came running up to Akira! As if to fill the gap of a year... as if to unleash their pent-up sexual desire... the two of them began a life of endless orgasms, completely naked, for the next 24 hours until his father returned home.