Hinatazaka46 is a Japanese idol group produced by Yasushi Akimoto. The group was established as a subgroup of Keyakizaka46 named Hiragana Keyakizaka46 on 30 November 2015, and was renamed and spun off into its own group on 11 February 2019. The group's name is adopted from the alternate reading of Hyūgazaka Street in Mita, Minato-ku, Tokyo, following the custom of naming groups after sloping streets in the Sakamichi Series. The captain of the group is Kumi Sasaki and its fans are referred to as Ohisama (おひさま).

"Kyun" is the debut single from Japanese idol group Hinatazaka46. It was released on March 27, 2019, through Sony Music Entertainment Japan. The title track features Nao Kosaka as center. The single was announced on February 11, 2019 on a Showroom livestream. The music video for the title track, "Kyun", was released on YouTube and Hinatazaka46's official website on March 5, 2019. The video was shot at a school and features a scene of around 100 people dancing on the school's outdoor field. It debuted at number one on the Oricon Singles Chart with over 476,000 copies sold.