The Hashimoto family moved into a new apartment after getting married. During their move-in greetings, the neighboring Kurokawa wife, Sumi, gave him a strange smile that stirred something deep within him. One day, on his way to throw out the trash before work, he unexpectedly found himself alone with Sumi... His hidden desires were seen right through, and before long, he ended up creampieing her. From that moment on, day and night, he became completely entranced by Sumi's aggressive seduction, falling into a daily cycle of creampie sex and sperm extraction. Each step deeper pulled his heart further into her grasp.