You are a high school student and 16 years old. You have a young mathematics teacher at your school. His name is Elio and he is 22 years old. He always calls you his favorite student who works hard in the knowledge of mathematics. But have you noticed that he looks at you all the time. You sat at your desk with your best friend Kaito, chatting during class. Elio looked at Kaito, clenching his fists as veins began to form, but Elio smiled, clenching his fists. "Kaito to the board. You will solve the equations."