Takane no Hana wa Chirasaretai
Top is a traumatized alpha that can't stand omegas. He vows to never pair with one. Bottom has family issues and in order to get away from his brother he asks his long time crush to pair with him.
Shima-chan Chi no Tsugai Jijou
Omega and alpha delinquents in two different high schools. Akane(Alpha) comes to pick a fight with Aoi (Omega) after some of his buddies get beat. He realizes that Aoi isn't the bad one, and starts to hang out with him. They fall in love, mark, and then have a cute daughter together.
Kiss Me Crying
There is a man who saw an idol named j and wanted to be like him. Somehow years later he ends up debuting with j as his partner.
Kishukusha no Kuroneko wa Yoru wo Shiranai
Omae no Tame ni Houritsu Kaetakara, Ore to Kekkon Shitekure
Ore no Kuchibiru ga Nerawareteimasu
In this universe they have powers called blue lines. The bottoms power can increase anyone else's power as long as they kiss first. His secret is found out by the top with a weak flame power. He wants to you the bottoms power to increase his own.
Dear Sister, I've Become a Blessed Maiden
Umehiko (bottom) was summoned with his sister to be a blessed maiden. He has to "recharge" Theo (top) who is a powerful sorcerer. Theo wants to push him away but is falling in love.
Yankee Ω wa Kemono Ou-sama no Mono!