START-353 The neighbor in the same apartment building... the beautiful married woman is a sexually frustrated slut! Every time the couple fights... she gets brutally pounded from behind through a 10cm hole in the wall – 5 days of secret affair. Aozora Hikari

The story follows the male protagonist as he develops a secret adulterous relationship with Aozora Hikari, a beautiful married woman living in the same apartment building. Frustrated and sexually unfulfilled due to frequent arguments with her husband, she uses a 10-centimeter diameter hole in the wall to receive the protagonist's intense penetration from behind after each quarrel. Over five days, they immerse themselves in forbidden passion, with the wall hole serving as their secret rendezvous point, filled with immoral pleasure and carnal ecstasy.