Long time lurker here, I just wanted to put my perspective out there since I feel that things are getting out of hand. If there was anything between PSJ and JYM I would assume it all started during Youn's kitchen. BUT when the dating rumors with PMY came out, PSJ did not deny it as someone who is committed to someone else would have.
Also, the interactions of PMY with KJW I find it sibling like or more on the guy bff vibe. I can say this because I act similarly with my guy friends.
Bottomline, we should not take things so seriously. Honestly, when I first heard that PMY was doing another romcom so soon I was apprehensive and I dreaded seeing how her interactions with her new leading man would be. But now, it's completely flipped around and I'm just enjoying everything.