"When a Man Falls in Love" Kim Seo Kyung is aware that his real brother is Song Seung Hun.

May 30, an episode of the MBC drama "When a Man Falls in Love" featured Roy Jang (Kim Seo Kyung) asking Lee Jae Hee (Yeon Woo Jin) to take over Golden Tree.

Unaware of Lee Jae Hee's plans, Han Tae Sang (Song Seung Hun) welcomes Roy Jang with open arms. In the meantime, Lee Jae Hee tries to convince the members of Golden Tree to change their sides.

However, Roy Jang was actually an ally of Han Tae Sang, not Lee Jae Hee. Roy Jang was adopted by the president of Asia Star and is currently the vice-president of the corporation. When Roy Jang's adoptive father Jang Ji Myung (Nam Kyung Eup) asks about Han Tae Sang, Roy Jang says, "My brother is a poor man. He doesn't have one person he can depend on. If I was him when I was 17-years-old, I would have tracked down my mother to bring me back." Roy Jang is Han Tae Min, Han Tae Sang's biological brother.

Even though Roy Jang finds himself unable to forgive his older brother, Jang Ji Myung tells him, "You being mad at him after all these years mean that you still love him very much. Family is there for one another no matter how bad they are. If he is your older brother, he is like my oldest son so I will be preparing to take in another son." Roy Jang then replies, "I'm going to protect him so that Lee Jae Hee can't destroy him."

During Roy Jang's stay with Han Tae Sang in Korea, he learns that his older brother can't eat spicy food, just like himself. He also learns that Han Tae Sang had been missing him all this time. Roy Jang eventually learns about the love triangle that involved Han Tae Sang with Seo Mi Do and Lee Jae Hee and decides that he will protect his older brother.

Later, Han Tae Sang finds out about Lee Jae Hee's plans and Lee Jae Hee faces a greater risk than ever before. Also, when Seo Mi Do finds out that Roy Jang is Han Tae Min, she goes to see Han Tae Sang to tell him the truth.

Also, when Lee Jae Hee finds out that his brother Lee Chang Hee (Kim Sung Oh) was the one who hit Seo Mi Do with his car, he tries to prove that it was ordered by Han Tae Sang. Lee Jae Hee continues to believe that Han Tae Sang tried to kill Lee Chang Hee in order to keep his orders secret.

In order to win over his love, Lee Jae Hee is on the verge of losing every single thing he has. What does fate have in store for him?