Lost in Starlight is a heterosexual romance centered on Nan-young and Jay, explicitly lacking LGBTQ+ representation within its narrative. Despite a creative team member's involvement in other LGBTQ+ themed works, this film does not feature identifiable LGBTQ+ characters or themes, aligning with South Korea's conservative media landscape.

No information is available about the film 'Lost in Starlight' or its content. Consequently, it is impossible to evaluate the portrayal of transsexual characters or themes within the movie. The assessment is N/A due to a complete lack of relevant data regarding the film's narrative or characters.

The movie does not contain any action or adventure elements.

The film introduces original characters, Nan-Young and Jay, whose gender identities are consistent throughout. There is no information suggesting any character was established as one gender in prior canon and portrayed as a different gender in this film.

The film is an original production set in 2050 Seoul, centering on Korean characters. There is no indication of prior source material or established character races that would allow for a race swap, as all characters are original to this specific film.