Honestly I'd have to agree, because right after sangmin had that scene with Kim it immediately moved to a scene where haemi showed interest on him for the first time. It's kind of clear that author-nim is making sure there's no away sangmin will be a male lead(〒﹏〒)
The blonde girl is so forceful even when the Mc isnt interested. Forced romance is weird, he would be better off with the villain