Trinity Seven: The Seven Magicians 3

 is the third volume of the Trinity Seven series written by Kenji Saitō and illustrated by Nao Akinari. The volume was originally released on April 5, 2012 and currently slated for release in the US on November 17, 2015.

Yen Press
I want to have total control over breakdown phenomenons.

At the Royal Biblia Academy, magical occurrences are commonplace…but ghosts?! While investigating a ghostly happening at the school, Arata and his friends find themselves trapped in the Eternal Library—where a pigtailed beauty suddenly appears before their eyes! Just who is this mysterious babe, and what is she after?!! It’s Volume 3 of this romantic comedy and sometimes-serious wizard school story!

Chapters

 * 09. Magic Gunner &amp; Shooting
 * 10. Gymnastics &amp; Dream World
 * Extra. Mission &amp; Girls
 * 11. Eternal Library &amp; Criminal
 * 12. Dark Mage &amp; Sub-Administer

Characters

 * Arata Kasuga
 * Yui Kurata
 * Arin Kannazuki
 * Lilith Asami
 * Akio Fudo
 * Mira Yamana
 * Levi Kazama
 * Astil Manuscript
 * Selina Sherlock

Flashback

 * Hijiri Kasuga

Introduction

 * Lieselotte Sherlock