Great question — answering as the UphillTech team:
The show is based on a webcomic by Kang Pool of the same name . One of the key topics of discussion by the parents of young Bongseok (a small boy with the power to float through the air) is whether they can afford to move to Seoul, a long-held dream of the mother. They discuss 'moving' on practically every panel for the first couple of episodes. Obviously there's also a bunch of double- and triple-meanings here. The situation is emotionally fraught and Bongseok is capable of floating, which is an unconventional form of moving.
Full answer by Valorum: https://movies.stackexchange.com/a/121514 (CC BY-SA 4.0).
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