I know 1/3 viewers might think the story and the logic of this drama has problems. ANyway it's a Romcom, plus illustrated TV shows. There's no drama or movie you watch would happen in real life nowaday or they might add stuffs. So, if you watch it with a curious and simple mind, with no expection or explanation. I think it's cute if everyone around me would be happy living together like that.
It doesn't happen in real life.
Dramas gave you a rest and appease your tired daily working day.
That's how Romcom was born originally in Korean, not Thai or Europe