The trailer "Summer Break Afraid of Retirement" released on July 21 quickly attracted the attention of the audience thanks to the chorus of the song "Radiant". On social networks, many people expressed their love and searched for information about the song. The melody has a gentle color, combined with Cody Nam Vo's voice, creating one of the musical highlights of the trailer.

The movie soundtrack "Rực rỡ" was cherished by director Huynh Lap from the early stages of project implementation, aiming to convey the question throughout the film: "What if this whole life is not brilliant?". The song does not place "brilliancy" in achievements or fame, but aims for everyday values such as family, peace and peace.
Musician Hua Kim Tuyen said that he chose pop ballad material, with a close and empathetic melody. The composing process began after exchanges with the director and learning about the story of the film. From the perspective of a young person who has struggled to find meaning in life, the male musician wants the song to become a confession about recognizing the values that are inherent in daily life.
Cody Nam Vo both performed the song "Rực rỡ" and played the role of Tri Binh in "Nghỉ hè sợ nghỉ hưu". In the film, Tri Binh is a young person of generation Z, intending to start a career and return to his hometown to live with his grandfather (NSƯT Cao Minh plays), from there starting a journey to explore family stories.

From the initial disagreements, the grandfather and grandson gradually become teammates on a journey to help them look back at choices, expectations and how each generation defines a meaningful life. The question "What if this whole life is not brilliant?" therefore not only appears in the song but is also an issue raised by the film with young characters.
Besides "Rực rỡ", the film also has a song performed by NSƯT Cao Minh, expected to be released in the near future. The two main actors both started from music before acting, creating a connection between the story of the young generation and the memories of the previous generation.
Summer vacation fears retirement" is scheduled to premiere nationwide from August 21, 2026, with special screenings from August 14.