Love this manga but... why do they have a globe that spins on the axis that the earth actually spins if that theory hadn't been proven yet?
Was the maker of the globe just really lucky in the way he decided it to spin?
He doesn't have a problem with his parents or step sister, and he doesn't think his mom was comparing him to his step sister either. He just finds the atmosphere at home very awkward and hard to be around, he also thinks that the family is better off without him. So he doesn't have anything...