It is wrong. You know how hard it is for dojun to open his heart and getting to know him? He has a hard time making friends and partner because of his insecurity. Hence why he not dare to be angry even tho he should.
Also the doctor chase after him all this time but it just for fun sake.
After all dojun effort on making him happy and satisfied with what he had, of coz he be dissapointed after listen to the conversation. He even let the doc to knot him even tho he also an alpha. Just for the doc tell them they r not in a serious relationship.
So yeah, that doctor fck up really bad. Aint no way i gonna let dojun forgive him so easily.