Achiga Joshi Gakuin Mahjong-bu

 (阿知賀女子学院麻雀部) is a unit formed as a tie-in with the drama Saki: Achiga-hen episode of side-A. Its members play the five main characters in the drama.

Members

 * Sakurada Hiyori (桜田ひより)
 * Ito Momoka (伊藤萌々香
 * Tsunematsu Yuri (恒松祐里)
 * Watanabe Koume (渡邉幸愛)
 * Nakayama Riko (中山莉子)

Singles

 * [2018.01.17] Egao no Hana / Haru ~spring~ (笑顔ノ花/春~spring~)