Love Upon a Time (; ) is a 2026 Thai boys' love television series, starring Siraphop Manithikhun (Net) and Radchapon Phornpinit (JJ), based on the novel of the same name by Littlebbear96. The series was produced by Domundi TV and Mandee Work.
The series premiered on Workpoint TV on 27 March 2026, airing on Fridays at 21:30 . The uncut version was made available for streaming at 22:30 ICT on iQIYI.
Nakun, a twenty-year-old student skeptical of superstitions, is unexpectedly transported back nearly four centuries to the Ayutthaya Kingdom. Mistaken for a missing young man named Klao, he assumes Klao's identity to uncover the mystery of his disappearance while searching for a way home. Meanwhile, Klao's friend Phop doubts Nakun's true identity and keeps a close watch on him, unconvinced that he is the younger brother he once knew.
The production of Love Upon a Time was announced on 13 December 2022 as part of Domundi's 2023 line-up, starring Siraphop Manithikhun (Net) and Supamongkon Wongwisut (Jamessu). In March 2024, Jamessu exited the project to focus on his career as a singer, being replaced by JJ Radchapon Phornpinit in May.
A propitious ceremony to bless the production was held on 13 June 2025 at the Ganesha shrine in Bangkok. Costume fitting was publicly released in June 2025 ahead of filming. To prepare for their roles, the cast had to attend workshops to practice the language used in the past. Principal photography started on 25 June 2025 and ended on 27 February 2026. In November 2025, filming was delayed due to heavy rains and floods in Thailand which damaged the main set, pushing the premiere from late 2025 to the late first quarter of 2026.
The pilot episode was released on 20 February 2025, while the official trailer was released on 6 March 2026.
The series was promoted with the Love Upon a Time Series Ep. 1 press conference and premiere screening event held at MCC Hall, The Mall Lifestore Bangkapi on 27 March 2026.