Group Astro(ASTRO) member Yoon San-ha delivered a heartfelt performance. On March 14, Yoon San-ha appeared on KBS 2TV's 'Immortal Songs' in the 'Late Kim Kwang-seok 30th Anniversary Tribute Special Part 1.' That day, Yoon San-ha mentioned his experience auditioning with the late Kim Kwang-seok's song "Becoming Dust," revealing that he is a "Kim Kwang-seok kid." He recalled, "In the fifth grade of elementary school, I played the guitar alone and sang 'Becoming Dust' in my first audition. Thanks to that song, I think I have come this far."

Before the stage, Yoon San-ha said, "Senior Kim Kwang-seok is a connection for me," and sincerely confessed, "My father used to play the guitar and sing a lot. Growing up watching that, I dreamed, 'This is music. I want to be a singer too.'" He chose the song "A Story of a Couple in Their 60s" that day and expressed, "In life, there comes a moment when you part with someone you love," adding, "Whether it's parents, friends, or older brothers, I hope this becomes a time to think of each precious person. I will sing with all my heart."

In the following stage, Yoon San-ha performed with actors, creating a drama-like performance. The actors' acting, which faithfully conveyed the lyrics of "A Story of a Couple in Their 60s," combined with Yoon San-ha's sweet vocals and deep emotion, completed a moving stage. Yoon San-ha's delicate and sincere emotional expression enhanced the immersion of the stage and left a profound impact on the audience. The cast watching praised, "It felt like watching a music drama," "It was a stage that helped me find my original intention," and "A stage that was unfair from the start."

Yoon San-ha will hold a small theater concert titled "YOON SAN-HA : SANiGHT Project #3 - Promise" twice on March 21 at 1:00 PM and 5:30 PM at Ewha Womans University ECC Samsung Hall in Seoul. This concert will look back on his musical journey and further strengthen communication with fans. Through this performance, Yoon San-ha plans to present a stage filled with sincere emotions.