- Heroine: Lin Wanxing, a sophomore student in the Oil Painting Department of the Academy of Fine Arts. She has a cute but resilient personality. She loves to paint the evening starry sky. She occasionally gets nervous in crowded situations due to social fear. She has the healing properties of the "little sun".
- Male protagonist: Lu Shiyan, a junior in the Department of Computer Science, is recognized as a "little guy". He looks cold and taciturn, but is actually careful and gentle. He is good at hiding his emotions and pays silent attention to the heroine. He can use code to make small tools to help the heroine solve problems.
- The tone of the story: no bloody misunderstandings, with "delicate tenderness running in both directions" as the main line, interspersed with campus daily life, professional growth and youthful throbbing, densely sweet and close to college life
