The film is based on Robert A. Heinlein’s classic sci-fi novel in 1957, The Door into Summer, and is set in Japan with Japanese cast members.
Anison singer LiSA’s brand new song “Surprise” is now introduced in a full trailer for the upcoming live-action film Natsu eno Tobira – Kimi no iru Mirai he – (The Door to Summer – To The Future Where You Are -).
While she has had many hit anime songs, this is the first time she has sung the theme song for a live-action movie.