Female protagonist: Su Wan, a freshman in the School of Liberal Arts, has a cute but resilient personality. She likes to record life in sketchbooks. She is a bit slow but has a delicate heart. Because of her "social fear" in high school, she is a little timid about taking the initiative to socialize. However, she gradually opens up after meeting the male protagonist.
- Male protagonist: Lu Xingmian, a sophomore in the Department of Computer Science, looks cold and taciturn, but is actually careful and gentle. He is a "man of the moment" on campus (top performer, main player in the basketball club), but he keeps a distance from people he is not familiar with. He is especially patient with Su Wan, and has a hidden "protective" attribute.
- Background: A well-known university in the south, with beautiful scenery in four seasons (cherry blossom path in spring, sycamore shade in summer, ginkgo forest in autumn, and first snow playground in winter), providing romantic scenes for sweet pets to interact with.
