 Typical "yaoi" "dōjinshi" features male-male pairings from non-romantic manga and anime.Much of the material derives from male-oriented "shōnen" and "seinen" works which contain close male-male friendships and are perceived by fans to imply elements of homoeroticism, such as with "Captain Tsubasa" and "Saint Seiya", two titles which popularized "yaoi" in the 1980s.