LiSA's new song "Surprise" has been picked up as the theme song for the movie 'Natsu e no Tobira: Kimi no Iru Mirai e' that's scheduled to open in theaters on February 19. 

'Natsu e no Tobira: Kimi no Iru Mirai e' is a film adaptation of Robert A. Heinlein's sci-fi novel 'The Door into Summer' that was published in 1957. Yamazaki Kento plays a scientist named Takakura Soichiro, Kiyohara Kaya is Soichiro's fiancee Riko, and Fujiki Naohito takes on the role of a humanoid robot that lends his power to Soichiro when he awakens 30 years later. 

LiSA expressed, "I feel happy to be in charge of the theme song of a film adaptation of a novel that has been loved around the world after so many years." She added, "I hope that this song will become a 'surprise' that exceeds expectations of our hearts that has the ability to feel the importance and preciousness of things that are close by."