The students are about to welcome their version of summer vacation! The Misfit Class is super excited but then, they're reminded that if they don't do well on the end of terminus exams, they'll have to stay for supplementary classes during their break. To avoid that from happening, they all want to avoid failing. But Iruma is a human and has very little knowledge concerning netherworld wisdom. To avoid failing, Iruma works with Asmodeus and Clara to study!
As for why Iruma was working 
hard on his studies...
...أمّا بالنّسبة لماذا كان إيروما يعمل بجدّ في دراسته
Warum stürzt sich Iruma ins Lernen?
Quanto al motivo per cui Iruma
 si sta impegnando tanto nello studio...
Por que Iruma está se
esforçando tanto nos estudos?
Почему же Ирума с головой
 погрузился в учебники?