My beautiful wife, who lives next door to me, is sexually unsatisfied. For five days, we have a secret, illicit affair, separated by a 10cm diameter hole in the wall created by a marital argument, involving vigorous, standing, rear-entry penetration deep inside her vagina. (Aozora Hikaru START-353)

One day, a hole appeared in the thin wall separating Hideki's room from the room next door because the couple living next door, Hikari and Yusuke, had been arguing. The hole couldn't be repaired immediately, and gradually, Hideki and Hikari began to communicate through it. Unable to bear Hikari's sadness at being treated so carelessly by her husband, Hideki gradually became attracted to her…