An increasingly advanced and developed society requires workers to have higher qualifications, which is especially true in one of the countries with the most developed economies in the world: Japan. But that is also the reason why the brother has to carry an additional burden on his shoulders and many bad things also start to happen. Ever since he applied to enter his brother's house, his younger brother has always paid attention to his beautiful sister-in-law, Kanako. When the brother went to work, he played the bastard trick of raping his sister - who had carried her when he was in difficulty, even though she resisted and screamed. And yet, that is just the beginning of the series of dark days that are about to happen to the gentle sister-in-law.