Horror anime create an atmosphere of unease. Like a Mystery, they encourage viewers to learn more about their world... but there may secrets that are better left unexplored. Through eerie music and sounds, visceral or disturbing imagery, or startling moments, works of Horror make you worry about what gruesome thing is coming next.
Yaoi, known as 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 and explicit content. As Anime-Planet's audience is mostly based in the West, we use the Western definition for both Yaoi and Shounen-ai.