Source Wikipedia:
Based on a popular book by Bandou Kenji
Midnight Sun, known in Japan as Song of the Sun (タイヨウのうた Taiyō no Uta), is a movie directed by Norihiro Koizumi starring the Japanese artist and singer Yui. In the movie, she plays the role of Kaoru Amane (雨音 薫 Amane Kaoru), a 16 year old girl who has the rare skin condition xeroderma pigmentosum (XP), a disease that makes the ultraviolet radiation of sunlight potentially lethal to her. Yui's character is partly based on herself, as she is an amateur singer and guitarist, and she performs three of Yui's songs in the movie; It's Happy Line, Good-bye Days and Skyline. There has also been a Japanese TV drama based on the movie, starring Takayuki Yamada and Erika Sawajiri, along with a manga also based on the movie by Minatsuki Tsunami.
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