In "Heart to Heart" Chun Jung Myung started to get slightly jealous of Lee Jae Yoon and started to fight over Choi Kang Hee.
On the 7th episode tvN Friday/Saturday drama "Heart to Heart" broadcast on January 30th, Ko Yi Suk (played by Chun Jung Myung) had a mental conflict with Jang Doo Soo (played by Lee Jae Yoon).
On this day, Jang Doo Soo waited in front of the hospital to meet Cha Hong Do. Jang Doo Soo gave Cha Hong Do a red scarf as a gift. Ko Yi Suk saw this and started to make fun of Cha Hong Do's red face.
After Cha Hong Do left the scene, Ko Yi Suk said, "I guess with the marriage ruined, Cha Hong Do must be feeling a bit hurt but I can't. Instead of letting Detective Jang have her, I'm going to have her." With this, he made a clear warning.
Jang Doo Soo said, "Do you think I'm going to just let that happen?" and snapped at him. Ko Yi Suk said, "Yes, I'm going to let that happen" and shot back.
With this, the two people have feelings for each other but are being coy with their feelings. It will be interesting to see if this develops into a romance.