Tansan Chronicle

 (炭酸くろにくるっ) is a four-member Japanese idol group formed on April 18, 2021.

Current members

 * Kurumi Nana (胡桃なな; ) (Joined June 24, 2022)
 * Seijo Haruki (星城春輝; ) (Joined June 1, 2023)
 * Fujimiya Moa (藤宮もあ; ) (Joined June 5, 2023)
 * Kohaku Rei (恋白れい; ) (Joined June 5, 2023)

Former members

 * Sakuraba Haru (桜庭はる; ) (Founding member; Left April 8, 2022)
 * Amatsuka Cocoa (天使ここあ; ) (Joined June 24, 2022; left September 18, 2022)
 * Takanami Azumi (鷹波あずみ; ) (Founding member; Graduated March 24, 2023)
 * Kurose Kaho (黒瀬夏萌; ) (Founding member; Graduated June 23, 2023)
 * Urumi Himeka (潤水ひめか; ) (Founding member; Graduated June 23, 2023)
 * Mashiro Saya (ましろさや; ) (Founding member; Graduated September 2, 2023)

Digital Singles

 * [2022.10.03] KimiSuki? (キミスキ?)

Unreleased Songs

 * [2021.12.19] Panorama Resort
 * [2021.12.19] Taketori Daisakusen! (竹取大作戦！)
 * [2021.12.31] Kyouikuron (教育論)
 * [2022.02.28] BoomBoom!!
 * [2022.05.22] Melon Soda (メロンソーダ)