Kashikomarimashita, Destiny
One of the best omegaverse stories I ever read. Though Aoi [Ω] is the eldest son of Toujou Family, but being an Omega boy - lowest rank of race, his dad even treated his stepmom over him. After his dad's gone, Aoi had to leave the house with his loyal butler Miyauchi [B]. The Saionji Family Head who owed Aoi's parents, took him in to work as apprentice butler. The heir Jirou [∝] & butler Kudou [∝] who're proud of their predominant Alpha & insulting Omegas, against it.
Ai to Makoto (Moriyo)
Sutenaide My Hero
Unmei Ja Nai Hito
seems really promising and the main characters are so cute. Alpha x omega. Alpha is able to control himself .
Unmei no Kisu wa Oazuke