Trinity Seven manga volume 1 features story by Kenji Saito and art by Akinari Nao.

Arata Kasuga transfers to the Royal Biblia Academy to solve the mystery of the destruction that is ravaging the world and that - more importantly - has stolen his cousin Hijiri from him. It's a tough road that lies ahead of Arata, but nothing's impossible when you have seven beautiful girls - each a master of her own magical art - at your side!