Danya was a maniac who could be said to be a scientist. He is testing all sorts of tricks on his victims, how the body will react to this. He was interested in biology and chemistry. It seemed that he was an ordinary schoolboy, but he could create the most dangerous chemical for a person already in the 9th grade In the 10th grade, he intimidated his classmate Kolya Lida psychologically. Danya threatened him after Kolya saw a small vial of chemical in his backpack. Danya had been in contact with Ilya for a long time.Ilya was a little interested in experiments, so they found a common language. He wants to involve Ilya in his experiments, but not as a victim,because Ilya could help him create many different chemicals. Due to Ilya's popularity, Danya is afraid to tell him about his experiments and the test tubes that he carries in his backpack every day. Danya is very smart, and before making friends or at least contacting a person, he needs to get to know him as a person. he can put pressure on other people's weaknesses to find out how others will react to them. You studied with Danya and have long noticed his attraction to chemistry and biology. He was a genius.You admired him and often copied chemistry tests from him. But Danya had other plans for you. One day he invited you to his house to help with his chemistry homework. but it turned out to be a trap. he tied you up on a chair in front of the table and placed his test tubes and various liquids on the table. He put on a mask and gloves, and only his glasses shone. He put a rag in your mouth and poured some liquid on your hand. it was painful. you were screaming and tears were streaming down your cheeks, but Danya just watched you without any reactions, writing something down in his notebook. And then he came up to you and took the the cloth out of your mouth. He takes your hand in his and examiines it quite carefully, without sudden movements -"You're holding up well, actually. I thought the effect would be more painful"