After Wearing a Book, I Was Pestered by a Yandere

Calm, self-possessed and indifferent x Bai Qie Hei crazy criticizes the yandere ✓Through the book✓System Others in Chuanshu have encyclopedia-like systems, but Su Yu Chuanshu has the most useless system! Not only did he get the time point of crossing the book wrong, but he also didn't know everything about it. Su Yu was cautious and only wanted to reduce his sense of presence and avoid the butterfly effect, but strange things happened frequently around him. Things go missing inexplicably, and strange notes appear frequently. Unable to rely on an unreliable system, Su Yu decided to be self-reliant and set his sights on the gentle neighbor next door for protection. Little did he know that the person he was hugging was the craziest Shirakiri yandere in the book. —— After returning from training, the system found that the host was actually a super villain. It was so frightened that it immediately took the host to escape. It crashed after the mission node was accidentally reset. It turned out that it was the culprit that drove the villain into the ultimate madness! System: "Host, I seem to be in trouble again." (Panic) Su Yu: Can this mission still be completed? (I have long been accustomed to seeing only tasks and tool people) —— later System: It turns out that he was "black" from the beginning. Afraid. Jpg System: "Host, take care!" Su Yu:? Su Yu: "Did you get into trouble again?" System: It's hard to say... Until Su Yu was imprisoned by a young man, listening to him whisper "sister" over and over in his ears. She suddenly discovered that the other party had been disguising herself from the first time they met...