He used his heat ,but the alpha said he already liked the omega even before that. The omega didn't use the drug he confessed before anything happened.
Wait what was the scene with the drug that triggers the heat ? Where is this okay? And why should it matter if the omega confessed? Or that the alpha liked him before that? As far as I see the scene he was forced and triggered into his heat which made the alpha lose his „consciousness“ and over his body? The omega purposely did cause that, or was there some misunderstanding that was explained later? Because if it wasn’t a misunderstanding and if he really drugged him or triggered his heat then the uke basically raped the seme if we talk about the fact that alphas in this particular omegaverse apparently can’t control their instincts and therefore are not sane and not consenting /able to consent
Ya the uke used a drug (because he can't go into heat)and rape the seme but the seme already liked the uke at the time but misunderstandings happen which caused confusion for the seme if the uke the was the same as other omgas but the uke was ordered by other jelly brother to mate with alpha against his will
After the omega drugged the alpha to make him mate with him I stopped reading. This is rape