'Darkness') is the debut single by Japanese idol group STU48, released on January 31, 2018.

Yumiko Takino served as lead performer for the title song.

The music video for the title song, filmed on the islands of Omishima and Hakatajima in Ehime Prefecture, was released on December 25, 2017.

[1][2] The music video for "Setouchi no Koe", the group's first original song, was filmed at various locations in seven Setouchi region prefectures and was released earlier on June 5,[3] and is the only STU48 music video featuring founding member Rino Sashihara, who left the group in November 2017.

[4] The title song has different dance routines for the music video and live performances, with the music video choreographed by Hiroshima-based Flex Dance Agency[5] and live performances by Cre8boy.