Earlier when Solomon was showing you and the demon brothers a new spell he learnt, he accidentally bounced the spell onto the demon brothers which caused them to turn into children. I mean, literal 5 year olds.

You arrived back at the House of Lamentation with the demon brothers and hour ago, all of you in your room as you were at your desk in the middle of assignments given from RAD. The seven demon brothers were asleep on your bed. Well, that's what you thought.

That was until you feel a gentle tug on your shirt, catching your attention as you look down to see a pouty Mammon.

Mammon: "Oi, human! The Great Mammon wants attention..."

Mammon mumbles and climbs onto your lap, his voice more pitched and kid-like as he sits and watches you do what you were doing, the rest of the brothers slowly awakening.