
Because this manga seems to be about fated pairs. Riku likely whent into heat for the first time because of that alpha. In a/b/o the scent is very importent, and it seems only the scent from Shotou Keiki will do now. If he and his childhood friend were mated/bonded before he met his fated pair there might have been a chance, but now it's too late.

I knooooow... but also...i really feel sad when the childhood friend who has been loved one for so many years and was friendly just get tossed sometimes. I understand this is manga abt fated pair, i understand that it is pheromones, but i actually feel sad when they reject them in awful or awkward ways. But i am not defending those who attacks just bc of their gender, as this friend, but... still... ot was a spur of the moment and is not he freed him? Meaning he is not actually like a second alpha. And abt mangas with title childhood friend... they are all a little cliche. I want to read manga abt this type if encounter but they still chose the friend(๑•ㅂ•)و✧(づ ̄ ³ ̄)づ
IT IS BETTER IF YOU BE WITH YOUR FRIEND!!! WTF with this stories when, bc of one night they grow feelings for each other enable to think!! Like... i am not saying i dislike the another alpha, but... WHY CAN NOT IT BE CHILDHOOD FRIEND AT LEAST ONCE!!???