Omae no Koi wa Ore no Mono
Uke the judo leader and seme the karate leader
Shounen No Kyoukai
Ch 9? :(prev: a few years later, taiga(ruka's friend found a sex friend omega male rin working at the bar where he drinks, ruka(omega) and rin bump each other and ruka helped him pick up the omega supressant he dropped, rin inv ruka to the bar where he works, at the bar kaoru(alpha, ruka's partner/lover/childhood friend) went to pick up ruka and when he came, he suddenly had his rut(similar to omega's heat) and out of nowhere rin had his heat that is supposedly not his heat time yet and he had took his supressant, rin chased after kaoru because he is his fated alpha taiga stopped him(apparently taiga's fated partner is ruka [from previous chapter taiga found out it was ruka because his heat smells different than the rest of omega]).)
Omega Shunki
Kin and kumo became couple and had 7 children. After their first child tou, both couple had difficulty to have more children. After some years, when tou is about to reach adulthood, he fell in love with ise, the wolf alpha doctor for omega cats, both couples finally had children of 6 adding burden to tou. In the end, tou become an omega and ise and him became couples.
Ou-sama to Puppy Love
Souichiro was a omega who has never planned to have partner in his entire life. On the day of his business trip, he forgot his suppressant pills and he was in heat the next day after work was over. As he was about to pass out, he asked a passing by person who is black tall foreigner man whom he thought an omega (because he doesn't show that he is affected by his pheromones) to take him to his room. When he woke up, he was naked and is in a unfamiliar room and then had a one night stand with the man. The next day, he woke up alone and he was left by the man. On the usual omega place, he talked about his bar friends about it and on the news the very same one night stand man was in it and apparently he was a king. Prev: alecc took souichiro to his home country as business related work.
Love Shuttle
Ch 55 Prev: Doyun went to work and he asked one of his coworker on where's taehan. He was with the chief for something and will be late. Then all of the sudden, Doyun became sweaty and sensed that his heat is coming. So he came to the locker room to look for his medicine and then he started releasing pheromone. The new guy introduce at the chapter where doyun started sensing other alpha's pheromone was behind him and SMELLED Doyun's pheromone and he reacted to it.
Juliet no Baka