In "Heard it Through the Grapevine" Yoo Joon Sang was humiliated in front of Jang Hyun Sung. Afterwards, he unleashed his anger onto Ko Ah Sung.

On the 7th episode of SBS Monday/Tuesday drama "Heard it Through the Grapevine (script Jung Sung Joo, director Ahn Pan Suk) broadcast on Mar. 16th, Han Jung Ho (played by Yoo Joon Sang) was embarrassed in front of Suh Hyung Shik (played by Jang Hyun Sung) because of Han In Sang (played by Lee Joon)'s intentions. Afterwards, he felt embarrassed and could only take his anger out onto Suh Bom (played by Ko Ah Sung).

Jung Ho gave a suggestion to the Hyung Shik couple regarding the employment and the rural farm living of their eldest daughter Suh Noo Ri (played by Gong Seung Yeon). Hearing this, the Hyung Shik couple was startled. In Sang apologized in his parent's stead and said, "I'm sorry to be embarrassed" as he got incredibly upset. At this, Jung Ho exploded and this lead to a fistfight.

In the end, the Jung Ho couple and Hyung Shik couple ended in a physical fight and Jung Ho and Choi Yeon Hee (played by Yoo Ho Jung) were in rage about the Hyung Shik couple.