Sci-fi, or science fiction, is a speculative genre which builds on imagination. Sci-fi anime ask, "what if things were different?" They explore a new world, whether it's the world of the future or past, a present Earth with a changed history, a land that was previously unknown, or another planet entirely. The genre commonly features humanity's inquisitiveness and innovation, as they grapple with new technologies, new societies, or new frontiers in Outer Space.
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.
Slice of life, or "nichijou" in Japanese, refers to events that occur on a daily basis such as getting ready for the day, light chores, enjoying a hobby, or preparing meals. These events differ depending on setting, but above all else are considered to be ordinary, everyday actions that don’t always follow a central plot. The related tags School Life and Work Life focus on ordinary events that take place in a school or work setting, respectively.