Park Chaeyoung was held at a gunpoint by Jeon Jungkook, for interfering his work. As she gets to know more about him, she gets to know how dangerous he is living in.

안녕 I'm Park Chaeyoung. And THIS is my diary. My life has always been a rollercoaster. I've officially debuted in Blackpink and I'm officially an idol. We turned out to be super popular so my agency told me to keep my identity a secret -- do well in school and keep my head down. A lot of people talk about 'Rosé' from Blackpink which is surprisingly me. One of my biggest fanboys turned out to be the one and only Jeon Jungkook- the boy I really despise, and his stupid group Bts. You now know enough about me - so keep your hands off my book 아니면 널 죽일거야!