Half a year after my niece, Rika and her husband moved into the apartment managed by my uncle, my sister, Ki and her husband moved in next door. Life with my harmonious sister, Ki and her husband was without complaint, but... Rika had a problem. It was the shadow of another woman she felt from her husband; she knew he was cheating because she had always been by his side. However, an intense stimulus awaited Rika as her growing anxiety became unbearable… The relationship between 'her husband and her sister' that she heard from her brother-in-law... and Rika's body, embraced by her brother-in-law, and then...
