It was released on April 19, 2023 through Sony Music Entertainment Japan and features the first appearance of Akari Nibu as the lead performer of a title song.

[8][6] Yūka Kageyama, for whom the single would be her last one with the group, was assigned to the front row of the choreography for the first time in a title song.

[14] The lyrics compare the re-emerging attraction after encountering a past love interest with the rediscovery of the titular ancient fish.

[6] Real Sound comments that "One Choice" is a modern pop song with a "poignant yet cheerful" melody which makes full use of live instruments, with lyrics that encourages one to "find their own desire" in a society with vast amounts of information and intermingling different values.

It also positively comments on "Koi wa Nigeashi ga Hayai" with its upbeat composition reminiscent of house music.