Trinity Seven

Everyday is a normal day in the small town where Kasuga Arata lives However everything changed on the day of the Black Sun and following it a magician appears before him The Black Sun caused the Breakdown Phenomenon which destroyed the town where he lives Because of this his normal life was artificially reconstructed by a Grimoire that his childhood friend had left Just what is the purpose of the magician coming to the town What will he do with the Grimoires keepsake