On August 8, Ha Sung Woon and Im Han Byul teamed up on KBS' 'Immortal Songs!'

The recent episode of 'Immortal Songs' presents songwriter Kim Eana, with performances by Ha Sung Woon and Im Han Byul, Tei, 2F (4Men members Shin Young Jae and Kim Won Joo, IZ*ONE, Jo Jung Min, and Im Jung Hee. (via Soompi)

Ha Sung Woon and Im Han Byul confirmed that they were friends when asked whether they had known each other before teaming up for 'Immortal Songs.' Ha Sung Woon further explained that Im Han Byul was the vocal director of his third mini album's title track 'Get Ready.'

Ha Sung Woon also revealed the directing style of Im Han Byul. He said that Im Han Byul has a directing style that makes people feel very comfortable. Han sung Woon continued that he taught him how to sing and praises him whenever he does good. "I felt very comfortable and gained a lot of confidence."

Jokingly, Im Han Byul interjected that he had to give him a lot of compliments to go early. The hosts of the show also asked Ha Sung Woon, considering that he already had won on 'Immortal Songs,' if he ever had given Im Han Byul any advice.

With a smile, Ha Sung Hoon responded that he didn't overthink that time that they won. He expressed that the effort he puts in is a little different this time and noted that it would be perfect for getting a trophy once again.

Furthermore, Ha Sung Woon also impressed the hosts with unique moves as he gave a glimpse of his choreography for 'Get Ready.' For the pair's performance, Ha Sung Woon and Im Han Byul sang Lee Sun Hee's 'Meet Him Among Them.'

Ha Sung Woo shared on the interview that his grandma and grandpa raised him, and since his grandfather is now living by himself, he sings the song from the heart to remind him of his grandparents.

Here's the clip of Ha Sung Woon and Im Han Byul emotional duet!