It was released on February 22, 2019, by Ariola Japan, as the theme song for the Nippon TV drama Innocence: False Accusation Lawyer.

[4] Tsuneta, the songwriter, described "Hakujitsu" as dark and emotional, based on him working alone in his room during the New Year's holidays.

[5][6] The music video for "Hakujitsu", directed by Perimetron's Osrin, was released on February 28, 2019.

[7][8] On the simplicity of the music video, Osrin said that it "relied on the power of the subject" and "turned out to be a work of art".

[10] It exceeded 100 million views on December 11, approximately nine and a half months after the video's release.