@nataliakay it's utterly obvious that most of us are kinda disturbed with jo woori's actions towards cha eunwoo, basically because she played a really possessive and insecure character in the drama. I think i havent witnessed a circumstance (judging from the bts) where cew is clingy towards her. Well, the umbrella bts, i think it's common manners to do that to any of your costar - or any person.
Aside from that, i havent seen any other scenes where cew seems so close towards her. He's mostly playful towards ISH actually. Probably because they are closer since they have a significant amount of scenes with each other.