Puella Magi Suzune Magica ( 魔法少女すずね☆マギカ, Mahou Shoujo Suzune Magica) is an upcoming spin-off manga by GAN. It is one of three spin-offs that have been released after The Rebellion Story, with the other two being a prequel to Puella Magi Oriko Magica and the new series Puella Magi Tart Magica: The Legend of "Jeanne d'Arc". The first volume containing chapters 1-4 was released on November 12, 2013, and it began serialization with chapter 5 in Manga Time Kirara Forward on November 22, 2013. The second volume was released on June 25, 2014.
Translated from this description:
A middle-schooler who gallantly sleeps in, Suzune. Though she always goes about with a bright smile, there's another side to her. That is, she's a magical girl assassin. What will be the fate of the four magical girls she ambushes...?! The first chapter of the spinoff that asks about the existence of "magical girls," and the goodness and evil residing within oneself!
Suzune Amano (天乃鈴音 Amano Suzune)
Haruka Kanade (奏遥香 Kanade Haruka)
Matsuri Hinata (日向茉莉 Hinata Matsuri)
Chisato Shion (詩音千里 Shion Chisato)
Arisa Narumi (成見亜理紗 Narumi Arisa)
Kyubey (キュゥべえ Kyuubee or Kyube)
- The first twelve pages are available for official preview here. Click on the orange button. (Japanese)