Head of the R&D department of a biotech company, people refer to 30-year-old Ai Li Si as a robotic and cold woman. At the age of 17, she is a positive and optimistic girl. Her warmth makes her good at caring for other people, especially her friends. She is best friends with Bai Shu Lei and Liu Xiao Fen, and eventually He Hao Yi. One day, an incident happens that causes Ai
