Idk maybe this part is here so that we can see the development of his insecurities go away. because at the end of the day even if they were to get into a relationship, with his mindset as it is they're going to break up. In the back of his mind he's always going to be scared that his boyfriend is going to be stolen by any random woman that he talks to. Which is why they showed the flashback. I mean is the seme going to live his whole life without any female friends?
There are so many things wrong with chapter especially page 20. first of all, where did to get the tape??? Secondly how he manage confine the seme's hand and WTH did the seme look confused after he did it. The seme is bigger and most likley stronger then the uke so he had to stay still for it to happen (╯°Д °)╯╧╧
I'm still rooting for the new couple but damn heesoo did the alpha wrong. Like wtf don't play with his emotions heesoo knew the alpha likes him and was still leading him on. Don't say yes you want to have sex then cry. The seme has feelings too!!
Side note: (this reminded me of George from grays anatomy)
So from what I see a general reason why people don't like her is just for the simple fact that she was talking to the seme. I didn't know gay men weren't supposed to have female friends.