In "Heard it Through the Grapevine," Lee Joon gave up the inheritance to his father Yoo Joon Sang and took part in the rebellion of the underdogs.
On the last episode of SBS Monday/Tuesday drama "Heard it through the Grapevine" broadcast on June 2nd, Park Kyung Tae (played by Huh Jung Do) started to help Han In Sang (played by Lee Joon) and Suh Bom (played by Ko Ah Sung) with their tutoring for free.
On this day, In Sang and Bom told Han Jung Ho (played by Yoo Joon Sang) that Kyung Tae had a condition to helping them. He said, "There's a condition to the teacher helping us. He has to give up the inheritance. Even if he fails the bar exam, he has to get into law school. Third, even if he gets good grades, he won't go to the same place as Han Song. I'm no longer an heir and no longer young. I'm going to go my own way" he declared.
In Sang and Bom left home and thought about whether or not they need to continue with the bar studying. Realistically, the two people could not study together. At this time, Kyung Tae approached them after knowing what was difficult. Until now, Kyung Tae had been helping out In Sang and Bom. Here, he volunteered to help them study and they were able to continue studying.