Trinity Seven: The Seven Magicians 11

 is the eleventh volume of the Trinity Seven manga series, written by Kenji Saitō and illustrated by Nao Akinari. The volume was released on April 9, 2015 in Japan by Fujimi Shobo and later released in the US by Yen Press on November 14, 2017.

Synopsis
The Magic Research Battle continues with an anticipated match--magical geniuses Lilith and Mira vs. fighting powerhouses Akio and Levi. But unbeknownst to Trinity Seven, there's something sinister underfoot. The Maguses of Akasha Academy are calling for the start of...the UNDERGROUND Magic Research Battle?!

Chapters

 * 44. Offense Type & Pure Breed
 * 45. Luxuria Magus & Heaven's Gift
 * 46. Backstage & Chrono Gemini
 * 47. Logos Mystery & Lost Master
 * 48. Saint Terminus & Demon Knights

Characters

 * Levi Kazama
 * Mira Yamana
 * Lilith Asami
 * Akio Fudo
 * Arata Kasuga
 * Astral Trinity
 * Selina Sherlock
 * Abyss Trinity
 * Master Biblia


 * Lugh
 * Hijiri Kasuga
 * Arsha
 * Master Liber
 * Anastasia-L
 * Lieselotte Sherlock
 * Arin Kannazuki
 * Yui Kurata

Trivia

 * Volume 11 was released with a different artwork cover with Lilith in a limited bundle with the OVA of the anime.