Don't belong. According to relevant information, the hero in the cartoon has a good impression on the fitness instructor, but it is not directly expressed, and the fitness instructor has not made a clear response to his feelings. Therefore, it can be said that there is an implicit interaction and emotional attraction between them, but it is not a formal relationship. Fitness instructor is a Japanese cartoon, in which "48 characters" refers to the 48th chapter in the cartoon. In this chapter, there is an ambiguous relationship between the hero and his fitness instructor, but it is not a clear relationship between them.