This review contains spoiler.

I don't understand Changsoo. He's very calculative. Even though he's not observant like Ain, he's well-informed about VC's politics. Why in the hell did he think it was okay for him to go against the CEO? He should've known about the relationship between Hanna's grandfather and the CEO. It was satisfying to see the CEO shut him up. I knew Ain's senior came back to the company to help Ain, but I didn't expect him to sacrifice himself for something bigger. He's helping the lives of many workers and companies. I hope he won't get into big trouble.

EXCEPTIONAL WRITING

Out of the 16 Episodes, this ep 15 is exceptionally written. It's so nuanced into human behavior I had to look up the writer. Very unusual for a penultimate episode.