Any BL manga I've read that has less than 4 spin-offs based on it. If it has more I probably made a separate list for it. Other: -Prequel used loosely to mean it was published before the mangas that follow it. It doesn't mean you have to read them all in order but for the most case it makes more sense if you do. -Companion means that both mangas were published simultaneously so reading order doesn't matter
