Shounen-ai
These titles are categorized as Shounen-ai. Boys' Love or BL in Japan is a genre mostly written by women, for women, that depicts homosexual relationships between men. Japan typically uses this single category for all forms of these relationships, sexual or not. In the West, the term Shounen-ai categorizes stories that focus on the emotional aspects of the relationships, while Yaoi categorizes more of the sexual aspects, such as Smut or explicit content. For a list of both kinds of titles, see BL.
