one day, a hole opened in the thin wall separating hideki's room and the next room, due to a fight between hikari and tomo, the couple living next door. there was no way to fix the hole in the wall immediately, and gradually hideki and hikari began to communicate through the hole in the wall. hideki, who couldn't leave hikari alone, who was saddened by being treated carelessly by her husband, was gradually attracted to her...