- Female protagonist: Su Nianxing, a freshman at the School of Design (visual communication design major), full of energy, with two shallow dimples in her smile, good at hand-drawing but not proficient in software operation, a bit "socially shy", nervous to the point of stuttering when facing strangers, but courageous enough to do what she likes. Impressed by the illustrations at the design exhibition, she gave up her major in normal school and chose to pursue her dream.
- Male protagonist: Lu Yu, a sophomore in the School of Physics (majoring in Theoretical Physics), the "cool academic god" on campus. He has a handsome appearance and wears thin-framed glasses. He seems to be quiet, but in fact he is very observant. He will silently remember other people's little habits and is good at solving problems and repairing small objects. He occasionally looks at the stars under the sycamore tree at the entrance of the laboratory, and has "exclusive tenderness" for the people he identifies.
- The tone of the story: Relaxing healing, set on the stage of a comprehensive university, focusing on the campus daily life of the "little sun of the design department" and the "god of the physics department" from unfamiliarity to familiarity, from secret love to passionate love, interspersed with professional learning, club activities, and friendship bonds, without misunderstandings, focusing on "preference and two-way growth in the details." - The heroine's roommates: Lin Xiaoran (animation major, lively and outgoing, Su Nianxing's "social partner"), Xia He (environmental design major, quiet and careful, good at crafts, Su Nianxing's "emotional tree hole");
- The hero's friends: Jiang Che (computer major, chatty Lotte, Lu Yu's "emotional assist"), Chen Yue (student in the same department, calm and reliable, often in the lab with Lu Yu);
- Other roles: Professor Zhang from the School of Design (an encouraging mentor who values Su Nianxing's creativity), Mr. Li from the Department of Physics
