Unmei no Kisu wa Oazuke
Complete | Nagatsuki Hakka | 2016 released
This is probably my favorite omegaverse on this platform, the seme is disrespectful just for long enough to create intrigue and spends 99% of the story being the most amazing seme one can ever expect, the uke is kind and sweet but also stands up for himself and what he believes (something he needs to do because he is an omega and nobody else is going to advocate for him).
Inma-kun wa Oshigoto Dekinai
Complete | HAREKAWA Shinta | 2019 released
The art is gorgeous, the story is very interesting and it has something to say about harmful work hours in Japan.
From Green Kitchen