Trinity Seven: The Seven Magicians 5

 is the fifth volume of the Trinity Seven series written and illustrated by Kenji Saitō and Nao Akinari respectively. The volume was published on January 7, 2013 in Japan by Fujimi Shobo and slated for release in the US on May 24, 2016 by Yen Press.

Yen Press
When the fierce battle with Liese comes to an end, Arata undergoes an unthinkable transformation and begins diligently devoting himself to his studies. And when Lilith catches him at it, she volunteers to be his...private tutor?! Meanwhile, Royal Liber Magic Academy, one of the three great magical academies, mysteriously disappears, and the headmaster temporarily assigns Arata to be the Second Seat in Grimoire Security! Then, Arata is granted a precious reunion; there's much ado about an outdoor hot spring; and even more fan service ensues in Volume 5 of this romantic comedy and sometimes-serious wizard school story!!

Chapters

 * 18. Study & Holiday
 * 19. Second Security & Dimension Trouble
 * 20. Ilias & Adventure
 * 21. Bible Battle & Sweet Memory
 * 22. Critical & Demon Lord

Characters

 * Arata Kasuga
 * Selina Sherlock
 * Lilith Asami
 * Levi Kazama
 * Arin Kannazuki
 * Yui Kurata
 * Sora
 * Mira Yamana
 * Master Biblia
 * Akio Fudo

Introduction

 * Ilia

Flashback

 * Hijiri Kasuga