Haha Sange 1

⁣Tomonori was enjoying a normal school life when his mother fell ill and passed away. His father quickly remarried the beautiful Hanae. Together with Marie, Hanae's daughter from a previous relationship, the four settled in as a new and happy family.
One day, Tomonori discovers that his father and Hanae had been adulterous lovers for years. Outraged, he assaults Hanae while they are alone that night...