The Penthouse S01 E03 Episode 3

"100th Floor Bloody Penthouse."

Seo Jin urges Seol A to sign a paper saying that she’ll give up her acceptance to Cheong Ah Arts High. Seol A doesn’t back down and firmly states how she’ll attend the school no matter what. On top of that, Seol A also mentions how she knows about Seo Jin and Dan Tae’s secret illicit love affair.