Erotic M
I liked this manga, as a sequel to Slave x Slave. All about what is an "S and M"..... although the second to last story didn't make any sense. Its supposed to be part of a new story.
Junai Fetizm
I really liked this couple, this is a sequel. It's great and so very sexy how their relationship continues to evolve sexually and in love. And wow, Natsu wants Takei no matter who, where or what is around them. Second time they put on a show for others semi-consciously just because they are so into each other. And into sex.
Kurui Naku no wa Boku no Ban Beta
3.2 3.4 Loved this manga, and it's prequel. A world where men can get pregnant, if they're omegas. But this time, it's the omega who looks down on a beta... sexy and hot and heartbreaking and sad. It's supposed to be considered ongoing so I hope it does. (The beta was i the prequel, and a great guy)
Kuroneko Kareshi no Amaekata
I love this authors series. There are least 4 that star the Black cat x Leopard, and other ones. Once I read the first one, couldnt stop till I read the whole series. Fun, emotional, sexy, possessive and there's a darkness to it, just under the surface. I've re-read and re-read.
Kuroneko Kareshi no Aishikata
I am in love with this series. Just for Black cat versus leopard (yes, I know it's x leopard but its sooo hot it's vs leopard), there are 5 mangas, each a volume with different names, so make sure to read them in order.
Kuroneko Kareshi no Afurekata
this is a great one in the series
Back Stage!!
For fans of love stage, back stage isn't called a sequel but a related series, but has scenes author couldn't put in, and scenes about older brother and the manager, shougo and rei. Also has some drawing and pages from the authors talking about how they made love stage. It's a cute, light read.
Bi No Kyoujin: Smoke