I Kept Pressing the 100-Million-Year Button and Came Out on Top, Vol. 2 (light novel) by Syuichi Tsukishima

After his power goes out of control for unknown reasons in the Elite FiveHoly Festival,Allen is suspended from school for a month and forced to workas a witchblade alongwith Lia and Rose. But as the three make names forthemselves outside of ThousandBlade Academy, they remain unaware that an oldenemy from Allen's past is hot ontheir heels and out for blood...
Binding: Paperback / softback