[@TheHangedMan]
If you're a mage taking the Monster Hunter class, then you absolutely need your familiar. Your familiar is now not another person, but a separate extension of yourself. You need them to cast spells that will be of any use in monster hunting. In vice versa, Familiars who want to take the course need their Mages as well, because it's only when their burden of mana is relieved that their Ability is at its peak processing. The other electives you can take independent of your partner, but if you want to take Monster Hunting, you need your partner.

And of course it's like high school, silly. It is a high school. And to some, maybe a curfew is just a suggestion. You don't have to be asleep by 10:00, just in your rooms. Of course, if you're willing to risk detention, you can of course roam the school at night.