Opera is a quarterly Japanese boys' love (BL) manga magazine. The magazine is published by Akane Shinsha, which launched Opera in 2005 as a successor to its earlier quarterly BL anthology magazine Edge. Notable titles serialized in Opera include Classmates, Go For It, Nakamura!, and the BL works of Natsume Ono.

Yaoi, also known as boys' love and its abbreviation BL , is a genre of fictional media originating in Japan that features homoerotic relationships between male characters. It is typically created by women for women and is thus distinct from bara, a genre of homoerotic media marketed to gay men, though yaoi does also attract a male audience and can be produced by male creators. Yaoi spans a wide range of media, including manga, anime, drama CDs, novels, video games, television series, films, and fan works. While "yaoi" is commonly used in the west as an umbrella term for Japanese-influenced media with male-male relationships, "boys' love" and "BL" are the generic terms for this kind of media in Japan and much of Asia.