Fukusu Mobure BL
Youichi, a gloomy scientist, creates two clones of himself with different personalities so he can research which one is preferred by Fubuki, the guy he likes. Once his plan is explained to his clones, they go out and come back with Fubuki as his hostage because it's better to try it first with body compatibility.
Zetsurin Horegusuri Aniki ga Nerau wa Ore no Shojo!?
This is just sex, no plot. Anyway, incest, like real incest, is kind of... Not so enjoyable. I prefer those stories where they're stepbrothers.
Paradigm Shift
Hibiya Daisuke, beta, is a scientist that works at a laboratory, there his new co-worker is no other than Makoto Shinoda, apparently a beta. After a work accident, Hibiya's body starts to change and some omega traces begin appear.
Poppy No Negai