START-353 | The beautiful wife in the apartment next door to me was sexually frustrated. For five days we engaged in a secret affair, thrusting into the depths of her vagina from behind through a 10cm diameter hole in the wall that had been made during a marital quarrel. Hikari Aozora

One day, a hole appears in the thin wall separating Hideki's room from the one next door due to a fight between the married couple Hikari and Yusuke who live next door. The hole cannot be repaired immediately, so Hideki and Hikari gradually start to communicate through the hole in the wall. Hideki cannot bear to leave Hikari alone, who is sad because her husband treats her so carelessly, and he gradually becomes attracted to her...