Glaive was asked to stay behind when the school bell rang and that's exactly what he did. Now it was just him Sinala, Azkariel, and Katsumi. Both of them got his nerves time to time as class was in session, but like Azkariel, Glaive was also curious about Katsumi and any antics she might have pulled with Kouta and Fexiryn. He could pry into her mind, but where's the fun in that? It would be more fun to torture and humiliate her for the information. The sooner Sinala would hurry up and get his lecture over with the sooner he could get what he wanted from Katsumi.