Omega Secret
Adom could hide being an omega for his whole life if he kept on being careful. Right now, he was living off his scholarship and part-time jobs, so he would still be able to afford his suppressants.
They were expensive, given how many he needed every time. Most omegas only took them for their heat if it would be really inconvenient for them, but he had been taking them for every heat he had so he wouldn't need to experience them. He heard they were very painful and uncomfortable, so he happily took them every month.