Ji-Pyeong is better for Dal-Mi because he cares for her in a way that Do San is not able to. He is able to give her advices and will tell her when she’s wrong. Do San is usually the one who is hopelessly in love and will just do whatever that pleases Dal-Mi. Although that is sweet, it is incredibly toxic and unhealthy in the long run.
But...I really cant feel the chemistry between Ji Pyeong and Dal-Mi though... I am not convinced by Ji Pyeong’s feelings for her. And I think they match better as a mentor-mentee rship, or like a brother-sister rship (it doesn’t hurt that he’s kinda like a son to the grandma too lol).
so although JiPyeong is “better” for DalMi, i think it would be really awkward for them to date too... DoSan and DalMi on the other hand is really comfortable with one another, and being together has helped each other grow a lot in terms of their career and just as a person as a whole (Sandbox). So after the truth comes out in ep9, I hope DoSan and DalMi will still be in good terms. I don’t think they should continue to date though, esp not now when DoSan is lowkey toxic and treating DalMi like some manic pixie dream girl. maybe like stay as friends, actually get to know one another as THE REAL PERSON, and perhaps like a ROY ending KEKEKKE where it’s left open-ended?