The film is the first motion picture to be about Cantopop lyric writing, with Chung taking on the lead and titular role as a student with frustrated aspirations to become a lyricist.

Filming took place in Hong Kong and Taiwan over fifteen days from July 2022 to April 2023, with several cast members accepting reduced or pro bono compensation due to budget constraints.

Finally, Sze embarks on a working holiday in Taiwan and overhears the demo song she had co-written with Mak playing on the radio in a convenience store.

[5][10] Numerous Cantopop lyricists, including Calvin Poon, Tim Lui, Saville Chan, Pakkin Leung, Cheng Man, Brian Tsang, GingerLemonCola, and Wong Chi Wah[a] also make cameo appearances either as themselves or in minor roles.

[12] Intrigued by the notion, she shared the story concept with Wong Hoi, a frequent collaborator, and together they decided to produce the film as an independent project funded by themselves.

[16][17] The film was originally titled "填詞撚" in Chinese, but due to the homophonic pronunciation of the word "撚" with a Cantonese profanity, it could not be broadcast or displayed on public posters in Hong Kong.

Wong suggested that the letter "L" could be interpreted in different ways, such as representing "Lyricist", the protagonist Law Wing Sze's name, or a person seating down after a long journey.

[9] The protagonist, Law Wing Sze, based on Wong herself, shares a similar passion for lyric writing that began during secondary school, aspiring to become a lyricist by sending out demos and participating in competitions before pursuing a career in filmmaking.

[13] Wong also drew inspiration from Chung Suet Ying's personal experiences, including the practice of earning extra income by selling idol merchandise outside the Hong Kong Coliseum.

[32] In March 2023, Eric Kot, Amy Tang, and Sabrina Ng were cast in leading roles, while Chu Pak Hong,[b] Jessey Tsang, and Taiwanese actor Oscar Chiu were announced to have cameo appearances in the film.

[21] Luna Shaw, Henick Chou, Sica Ho, Stephy Tang, Leung Chung Hang, Yeung Wai Lun and Angel Lam were later revealed to be part of the ensemble through the official trailer released in December 2023.

[6] She handpicked Chung Suet Ying, who is a real-life lyricist, during the early stages of production due to the resemblance in their vibes and life experiences to the protagonist Law Wing Sze.

[36][37] Anson Chan, initially cast for a cameo role, had his part significantly expanded by Wong during the production, ultimately making him the male lead.

[19][35] Poon, who made his feature film debut, was cast in a dramatic role and requested by Wong not to portray the character in a comical way, contrasting with his comedic reputation on the YouTube channel Trial & Error.

[1][14] Henick Chou, who was a friend of the assistant director,[40] as well as Stephy Tang and Chu Pak Hong, who collaborated with Norris Wong in My Prince Edward, were also cast in the film.

[5] Chu, portraying an always-criticizing lyric writing teacher, noted that Wong had granted him more creative freedom in this project, enabling him to draw inspiration from snobby seniors he had encountered in his life and depict the character comically.

[25][46] The theme song of the film, titled "A Lyricist Wannabe", was composed and performed by independent singer Ngayi Tse, with lyrics also written by Norris Wong.

[59] Phil Hoad of The Guardian gave the film 3/5 stars and acknowledged the poignant exploration of the emotional risks in pursuing dreams within the cutthroat Cantopop industry, while its journal-style aesthetic and seamless integration of songs contribute to its intimate and enriching storytelling.

[52] Edmund Lee of South China Morning Post gave the film 4/5 stars and praised its technical insight into Cantopop lyric writing, which adds poignancy to the frustrated dreams and continuous struggles of the underdog protagonist, with a charismatic performance delivered by emerging actress Chung Suet Ying.

[61] Keith Ho, writing for HK01, lauded the performances of the ensemble cast and the evocative portrayal of a realistic tragedy that prompted contemplation on the choice between accepting reality or persevering in the pursuit of dreams.

[8] Dennis Chan of Ming Pao shared a similar view with Sek and Ho, commenting that the film is a touching tale of failure in the pursuit of a dream, with an additional resonance that captivated the Hong Kong audience due to its emphasis on Cantonese linguistics.