To Raise a Yandere, I Have No Choice but to Scheme Against the World!

The white-haired girl I raised with my own hands seems a little off. She has amnesia and clings to me, looking at me with the most innocent eyes. Then, on the night of the victory banquet, I got so drunk I blacked out. When I woke up, she was wearing my shirt and lying beside me. She announced innocently, “From today on, you belong to me alone, Big Brother.” I thought it was an accident, until I discovered what she had hidden under her pillow… and the top-secret file on her computer that could destroy my rival’s entire family… When the campus beauty senior made a move on me, she smiled and handed me a bloodstained knife: “Big Brother, should I make her disappear?”