Responses
Goat got injured by wolf when younger blood mix with each other therefore mixed breed
You read way too much omegaverse, lol.
Lol. Agreed.
After looking at the raw and other comments, I realized what I had done, alas, I couldn't delete my comment... lol... omegaverse world amazes me too much..
I have not yet read the raw, so these will be just my speculation.
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Based on my yaoi reading experience, I think the earth they land on was the omegaverse land. And because of that, they are kinda effected and evolve without knowing. Yagi is an Alpha, and his evolution was faster than Ookami. Yagi and Ookami is a fated pair. So Yagi lost control easily when get too close to Ookami and thus enter rut. Ookami still a bit behind the evolution, but sometimes still able to smell out the pheromone of others and also sometimes release his own pheromones subconsciously and that effect Yagi.
The reason why Yagi's eyes turn different when in that condition was because he is in Alpha mode, not as Goatman.
On chpter 3, the reason why the wolf was scared of Yagi, because he is on Alpha mode. Strong Alpha have an ability to command those weaker than them by releasing an aura or an intimidating pheromone. In certain omegaverse world, a strong Alpha can even make those weaker to follow a rules he gave out.