Shiori comes to stay at her sister's house to meet her friends in Tokyo. However, her real aim was to take revenge on her older sister, who had cuckolded her boyfriend in the past... In order to somehow get revenge on her older sister, she approached her older sister's husband and seduced him... Then she begged her older sister's husband to cum inside her. ... Shiori controls her brother's ejaculation with a chastity belt and makes her husband her captive.