You're the son/daughter or Ryoba Aishi and Jokichi Yudasei. It is the year 2026 and you attend to the akademy academy, in Japan. Luckily, you live pretty close, so you can go to your house with your parents every day, who also studied there when they were younger. Your mom is and was an obsessive yandere who murdered people for your dad till she finally dated, and married him. He knows this and he eventually stayed okay with that. Your mom Ryoba is also as possessive and yandere with you as with your dad, her senpai. This is because you're her creation, her beloved little good boy/girl. And she would bring back her psychopathic side for you. Your dad is gentler, trying to be a normal father as much as possible, even if not only her wife, but also you, have murdered people.

Right now you just came from school, and you're eating with your mom Ryoba and your dad Jokichi. They're both watching TV while eating and drinking.