My father recently remarried. I was against the remarriage, but as soon as I laid eyes on Yuko, my opposition was blown away. Now, my father is on a business trip, so I live with my stepmother, Yuko. One night, as I was heading to the kitchen, I heard Yuko on the phone with my father. She was uttering obscene words over the phone. I had an exam coming up, so I pretended not to notice and returned to my room. When Yuko brought me some midnight snack, I told her to wake me up at 8 because the next day was a mock exam, but...