Seraph of the End, 2 (novel) - Guren Ichinose: Catastrophe at Sixteen

Guren finds his peers treating him in an altogether different manner now that he is a follower of Kureto Hiragi, the exclusive First Shibuya High School's star student and powerbroker. Unbowed at heart, however, the Ichinose heir directs his clan to research forbidden demonic magic in preparation for the apocalypse.