
If you're looking for manga similar to Mihattatsu Omega: Dekiai Alpha to, Hajimete no Hatsujou, you might like these titles.
Genjirou Momoyama is a poor and unpopular omega, and suppressants don't work on him. Every time his heat comes, he has to go to an omega shelter, and it's tough. Touji Sakurada, a high-end alpha who owns a leading pharmaceutical company in the development of suppressants, falls in love at first sight with Genjirou as his "clinical trial subject." Genjirou, tempted by the reward, agrees to be Sakurada's subject, but starts getting tired of Sakurada's research and constant monitoring...! An omegaverse romance comedy starring a rich alpha who wants to save omegas and a poor, big, unpopular, and non-standard omega is here!!
In this world, people are categorized into one of three secondary genders: alphas, betas, and omegas. Alphas (α) are seen as society's elites. They find success in any endeavor without the need for much effort. Betas (β) are seen as the "average" and most populous, without major alpha or omega traits. Omegas (Ω) are perceived as unfortunate souls, bound to their heats that produce strong pheromones, sometimes strong enough to attract even betas. Hayato Kujo works hard, uncharacteristic for an alpha. But no matter his feat, everybody around him attributes his success to his alpha genes, except for Kaname Yao, a classmate and teammate on his high school's track and field team. Yao views Kujo as a rival and serious athlete, regardless of their genders: Kujo an alpha and Yao the beta...? Wait a minute... Yao was surely not prepared to get all mixed up in this alpha-beta-omega-fated-mate-bond stuff.
In "Alpha", a high-class host club where only the most handsome, most well-bred alpha tops are available for rent, number one host Ruka Kitami does his best to seem as effortlessly cool as possible. On the other hand, there's the new kid, number two host Leo, who doesn't have to pretend to be effortlessly cool - he just is. Now, what happens if one of their dear customers demands these two alphas take each other to bed?
Kenzaki Ryuunosuke, also known as Samurai-sensei, is an Ω who often gets mistaken for an α because of his manly look and strong power. He took over his grandfather’s dojo and became a kendo teacher, though recently, weird people have been visiting him for the shopping center development of the area. He protected the dojo, having the table turned on them as if it’s nothing. But one day, their boss, Ootori Masamune, finally comes to the dojo, and…?