In "Heard it through the Grapevine" Lee Joon left Ko Ah Sung. With that, he returned to his royal household.

On the 18th episode of SBS Monday/Tuesday drama "Heard it through the Grapevine" (script Jung Sung Joo, director Ahn Pan Suk) broadcast on May 18th, Suh Bom (played by Ko Ah Sung) had informed In Sang (played by Lee Joon) that she wished to split up. With that, In Sang returned home all alone without her.

Before this, In Sang heard from Jung Ho (played by Yoo Joon Sang) about the great amount of inheritance. In order for this to be granted to him, he needed to break up with Suh Bom. After getting persuaded by Jung Ho, In Sang made up his find. In the end, Suh Bom talked about separation. She had decided to break up with him and therefore he had given up.

Suh Bom was left at her house and In Sang came home. Jung Ho and Yeon Hee comforted him, telling him that they would take care of the aftermath. Yeon Hee said, "Don't you worry about everything else. Just get a full night's rest."

Coming back home alone, In Sang recollected being with Suh Bom and looked at the pictures that they had taken. He couldn't help but feel his aching heart. He pounded the glass and his loneliness thus exploded.