I Kept Pressing the 100-Million-Year Button and Came Out on Top, Vol. 6 (light novel) - Syuichi Tsukishima - Bog

Now that Allen has put a stop to Raine Grad and freed Daglio from Black Organization rule, he finally has an opportunity to catch his breath. But with Claude transferring into Thousand Blade Academy, things won¿t be calm for long! Later, the entire student body scrambles for Allen¿s attention during Thousand Blade¿s annual Christmas Party.