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I was curious so I looked up cookie and yoghurt omegaverse, this is what came up. I've never read it so I'm unsure if this is what you're looking for.
https://www.mangago.zone/read-manga/dependency_x/
It is this one. Thank you! Didn't expect it is still ongoing.
Hello, I've read it like around 5 years ago. It is an omegaverse BL manhua. The MC has pheromones of Cookie and the ML (white hair) has the pheromones of yougourt.
It has a cute art and is colored. ML is enrolled in miltary academy and MC is in omega training center something.