Rosy Chronicle is a Japanese female idol group under Hello! Project, officially formed on June 16, 2024, with nine members: Ayuka Hashida (leader), Himeha Yoshida, Karin Onoda, Ayana Murakoshi, Hazumi Uemura, Yuriya Matsubara, Hama Shimakawa, Reina Kamimura, and Yume Soma. The group originated from Hello Pro Kenshusei (trainee unit), with the first members announced in May 2023. Additional members joined during the Hello! Project Kenshusei Happyoukai 2024 June "Lily" performance, where the group’s name—Rosy Chronicle—was also revealed. By July 2024, each member received a designated member color, and Ayuka Hashida was named group leader. Their presence quickly expanded through social media. Rosy Chronicle made their major CD debut on March 19, 2025, with the single "Heirasshai! – Nippon de Aimashō / Ubu to Zuru".
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