Ahead of its official release, the song was pre-released on 8 January 2016 for digital download.

[1] "Future Lover (Mirai Koibito)" is a up-tempo electronic dance music (EDM) track with the elements of traditional Japanese music, and incorporates the Daft Punk song "One More Time" (2000).

[7] On the Oricon Weekly Singles Chart, the single debuted at number 42 with the sales of 1,172 copies and stayed on the chart for two consecutive weeks, selling 1,456 physical copies in total.

[2] Kato performed "Future Lover -Mirai Koibito-" on 9 January 2016 at the "Ageha New Years Party Day 1 feat.

[9] Later, "Future Lover -Mirai Koibito-" was included on the setlists of Kato's "Dramatic Liberty" Tour 2016, on which she embarked April 2016.