The Mystery of 'Pandol' revealed at last...
Anyhow, note to translators: those two places where Yool goes "Why" in page 16 to Sunghwi's constant staring at her apartment would probably read better as "What?" and "What is it already??" (for the second time when she's louder about it)
I also liked how Yool's apperance is gradually starting to resemble Yoori more and more in this chapter