Maku ga Oritara Bokura wa Tsugai
Mitsuki is the number one idol, but he's hiding his omega gender. Mahiro is the overly friendly number two idol, but when circumstances force them to perform together, it ends with Mitsuki going into heat. Mahiro sleeps with him and offers to bite his neck, pairing with Mitsuki so others won't notice his pheromones in the future, and Mitsuki agrees. Now the two are put into a unit together while also getting used to their basically contractual pairing. But Mahiro's feelings for Mitsuki go much deeper, and the more time they spend together, the more Mitsuki starts to come around. Continues into their relationship. Trigger warning: forced outing.
Ore no Tsugai ha Thoroughbread Omega
Leo is an alpha and a second-generation actor who's working his butt off to be taken seriously, which is why it drives him crazy to see Eito, another alpha second-generation actor, who always seems to be messing around. But when the two get cast as leads in an alpha x omega romance movie, Leo is shocked by Eito's talent. Then, when they're made to spend the night together to increase their chemistry on set, Eito reveals he's really an omega and the two begin a physical relationship that can't seem to be stopped. I like both the main couple and their friends and I think this one has really well done characters, which can be hard in so few chapters. Trigger warning: forced outing.
Usotsuki Omega No Kamase Kata