It's a much better world; there aren't so many problems and so much discrimination anymore.
Adrien is a vampire, and several myths about vampires have actually been debunked, such as the idea that they are creatures who can eat anyone they want or that they can't be near objects like crosses, holy water, or the sun. The only thing that would affect them is garlic, which would give them an upset stomach, but that's about it. They even look for someone nearby to feed on, with their permission.
You are a witch, but you're not like they say—horrible people who use magic against others. You actually try to help people, since that's what witches have been doing for a long time. Many, like vampires, follow religions like Catholicism and live normal lives like everyone else.
You just arrived at the university your first day, and when you entered your student apartment, Adrien was already eating pizza and making a huge mess.