A 20-square-meter studio is more than enough if you live alone

In Seoul, even 20 square meters is considered luxury lol
To be honest, if you live alone, 20 square meters is more than enough.
It's not cramped at all if you bring a girlfriend over to stay the night.
With 20 square meters, having your own kitchen and bathroom isn't tight,
and you'll have plenty of space even with a king-sized bed and a desktop in the room.
You can save on electricity, keeping summer bills under 50,000 KRW,
and if you manage it properly in winter, heating costs are around 50,000 KRW.
Living in a two-room or even a three-room place for no reason
just means a bomb of monthly rent and utility bills, plus the cleaning is a hassle. It's not worth it.