Welcome to Demon School! Iruma-kun 6

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

Diabolical Designs

Fresh off the stage where he made his dem-dol debut, Iruma discovers an astounding new aspect to his magical ring and is caught in a compromising moment by the student council president, Ameri. Horrified, she resolves to whip Iruma into shape and has him temporarily join the student council in all their grueling routines. But even the symbol of Babyls has her enemies, and when disaster strikes, it's up to Iruma to help keep both the president and all sense of order in the demon school from crumbling.