SPOILER
yeah that's not happening.
The whole chapter was Taehan assuming/thinking Doyun is jealous when in reality he isn't that much. Even when Doyun saw Taehan's ex, only Taehan was panicking. Red-head was chatting with Doyun and showed him their pic when they dated. He asked Doyun if he was a beta cuz he couldn't smell alpha phermones. And Doyun said 'what do you think?' with a smile and struck right in the heart! Lol red-head was like 'I just broke up with someone I'm single and I don't mind betas too. ' Taehan broke them off saying 'No, he's an omega! my omega!' Doyun later asked Taehan what is he doing cuz he is the only one overreacting. Taehan realised as well at the end. Taehan is the overreactor in the relationship
So spoiler
In the raws
In chapter 72 there's a new red haired guy and seems like he's Taehan's ex? Looks like we're getting some jealousy and drama soon