Welcome to Demon School! Iruma-kun 9

Welcome to Demon School, Iruma-kun is really fun... It never loses its central heart and manages to blend humor and more serious plotlines smoothly....a nice attention to detail in both art and story, and plenty of laugh-out-loud moments, this is a comedy that's worth your time. - Anime News Network

Party at Walter Park

After safely passing their exams, Iruma and his friends start their end of terminus break from classes with a trip to Walter Park! Little do they know, however, the famous netherworld amusement park is actually built on top of a prison fortress whose inmates are hatching a sinister plan of monstrous proportions...!