In tvN "Heart to Heart" Lee Jae Yoon got furious at Chun Jun Myung.

On the 5th episode of tvN Friday/Saturday drama "Heart to Heart" broadcast on January 23rd, Jang Doo Soo (played by Lee Jae Yoon) threw a punch at Ko Lee Suk (played by Chun Jun Myung).

After this day, Jang Doo Soo started to worry about Cha Hong Do (played by Choi Kang Hee) because he couldn't get in contact with her. Jang Doo Soo goes to Ko Lee Suk's house after he hears a rumor that he is involved with many women.

Jang Doo Soo said, "Did you do something to Cha Hong Do that you weren't supposed to?" Ko Lee Suk said, "Are you interrogating me as a cop? With personal interest? I slept with her, Is that what you needed to hear?" and shot back.

Jang Doo Soo got angry and threw a punch at him. He said, "I thought you guys were patient and doctor but I guess not" and said harsh words.

Jang Doo Soo said, "Do you love Hong Do? Is it right that you had relations with her without any emotions? She's someone that's just starting come back out of her shell and you have no guilt? You're a dog" and was upset.