The band "impossible" is a real legendary Thai band. The actual lead-singer also stars as himself in the future where the band "possible" traveled to in the movie.
Apisit Opasaimlikit is a very famous hip-hop singer and song writer in Thailand. He is better known by his stage name "Joey Boy".
Apisit Opasaimlikit was the one who came up with the idea for the movie and wrote the script. After the studio, GTH, showed its interest in the script, Apisit made one of the producers agree upon one condition that he get to star as the lead character "Toi" or the studio never get the right to shoot the film.
Three members of "the Possible" are Thai music artists in real life. Apisit Opasaimlikit is a hip-hop singer under stage name "Joey Boy". Piya Satraweha is a solo rock artist known as "Yokee Playboy". He is also in a Thai indie-rock group "2 Days Ago Kids". Chakrapong Siririn, who plays bass in the movie, is a very talented bassist of an alternative/punk rock band "Paradox".