
yes it is! though it's not the main theme of the story at all, seems like author chose an omegaverse just so they could be legally married without any problems and because the smut is more fun haha
I think that so far here in translated webtoon the only time they mentioned their secondary genders was in the first chapter when Yeonseo was going into a rut and Suhan barged in

Only their first time happened because of Yeonseo's rut! Because of the accident and medicaments Suhan won't be having a regular heat cycle for a good while. They do often use their pheromones while having sex but its always affectionately or to enhance their sensitivities, it's never used to coerce the other!

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yes ٩(๑❛ᴗ❛๑)۶ it's a little complicated bc Suhan got pregnant while he still hadn't recovered his memories. He then gains them back when he's 6 months into the pregnancy but doesn't remember when the time he spent with Yeonseo after the accident. Both Suhans are very jealous of the other version of themselves. Very happy ending though.
I couldn't wait any longer and I went and read the novel. I tried so hard to think about something that I didn't like but it was really THAT good. It's not too short but not too long (142 chapters + sides) there are a shit ton of soft moments, the angst arcs don't drag for too long, there are good moments of action and... oh my god the smut is really REALLY REALLY INCREDIBLE.
I ended loving the main leads so so much, Yeonseo is the perfect alpha and top, he's so cute, loyal and loving and both Suhan, the one before the memory loss and the one after the accident are SO DEAR to me I love them to the end of the world.
I think it will be a long webtoon though so I would highly recommend to let it marinate at least until the end of the season hahah i promise you will enjoy the ride and please always trust Yeonseo AND Suhan!
If you're interested I read the novel in korean on booktoki and I think readhive is translating in english!