The popular kids–especially one girl, Marin Kitagawa–seem like they live in a completely different world.
This means that since the anime started, 2.5 million copies of the manga have been picked up by retailers and people across Japan, with 500,000 of those in the last 3 weeks, which is just after the anime ended!
He also runs a YouTube channel about Japan stuff called TheDoctorDazza, tweets at @DoctorDazza, and posts photos of his travels on Instagram.