In episodes 3 and 4 of JTBC's Friday series "My Youth," Song Joong-ki and Chun Woo-hee confirmed their feelings for each other with a kiss. In this episode, Sun Woo-hae (played by Song Joong-ki) decided to take a step closer to Seong Je-yeon (played by Chun Woo-hee). To see Seong Je-yeon, Sun Woo-hae decided to appear in a documentary and faced painful memories from his past. However, this time he was not alone. Seong Je-yeon's warm comfort became a great strength for Sun Woo-hae.

Sun Woo-hae ended the episode by confessing to Seong Je-yeon, saying, "A heart sent to a friend I broke up with," and kissing her. This scene heightened curiosity about the change in their relationship. On that day, Sun Woo-hae decided to film the documentary together with Mo Tae-rin (played by Lee Joo-myung). However, concerns about Sun Woo-hae's return to broadcasting were not only felt by Seong Je-yeon. Kim Pil-doo (played by Jin Kyung) felt uncomfortable with Sun Woo-hae being involved with her.

The only reason Sun Woo-hae decided to appear on the broadcast was Seong Je-yeon. He gathered courage, thinking he would be able to see Seong Je-yeon more often. However, during filming, when the camera and staff's gaze turned toward him, memories of his childhood wounds as a child actor resurfaced. Seong Je-yeon sensed Sun Woo-hae's change and worried. Sun Woo-hae explained that he was just nervous, but the crisis came again.

When news of Sun Woo-hae's return to broadcasting spread, videos from his past began to circulate. A video showing young Sun Woo-hae left alone at his mother's funeral, who was involved in a fraud case, was released, creating negative public opinion. The young Sun Woo-hae did not shed a single tear at his mother's funeral, and that wound still tormented him as an adult.

In this situation, Seong Je-yeon held onto Sun Woo-hae. She warmly embraced him and apologized, and Sun Woo-hae asked, "Can you just hold me one more time?" Seong Je-yeon hugged him again, and at that moment, Sun Woo-hae felt as if his childhood pain was being comforted.

Sun Woo-hae's childhood acting career was like a thread connecting him to his family. He built a successful career by winning the youngest Best Actor award, but his glamorous child star days did not last long. He was notified to leave the sitcom he appeared in with Mo Tae-rin, and after his mother's death, everything ended. Sun Woo-hae realized the "comfort that comes from disbelief" at a very early age.

Sun Woo-hae was bothered by Seong Je-yeon avoiding him. Seong Je-yeon confessed that she felt guilty for dragging him into unnecessary matters. Sun Woo-hae replied that he was okay, but Seong Je-yeon's heart was heavy. She asked Sun Woo-hae why he decided to appear in the documentary, and he expressed his true feelings.

With their lips close, the two confirmed their feelings for each other. When Seong Je-yeon asked, "If you don't hate it?" Sun Woo-hae replied, "I'm glad," and kissed her. This scene marked the beginning of a change in their relationship.

Meanwhile, changes also came to Mo Tae-rin and Kim Seok-joo (played by Seo Ji-hoon). Kim Seok-joo smiled thinking of Mo Tae-rin, and their story is expected to unfold interestingly. "My Youth" airs two consecutive episodes every Friday at 8:50 PM.