Following from the first installment, In Seoul Season 2 is about Kang Dami and Lee Harim's friendship as they decide to cohabitate whilst studying at a University in Seoul. Along the way, they experience hardships that can take a massive toll on their friendship. Season 2 focuses on the friendship between two best friends and how one mistake can have a serious impact on their lives.
This drama touches on honesty and the importance of communication with one another in friendships, as well as fake friends and relationships. For the first season, we got to see the struggles of Dami as a student and a BTS superfan who has an uptight relationship with her Mother so in this season, we see the struggles of Dami as a student representative at University and living together with her best friend, Harim

We get introduced to a new main character in this season, which is Cheoltto. He is my favourite character out of them all. He perfectly portrays a tsundere - who's cold at first, but eventually starts to show his friendlier and warmer side. I love the way he gets introduced into this drama and I love the development between him and Harim.
As for Harim, she is also my favourite. For someone who was adamant on not committing herself into a relationship again (which is evident in 4 Reasons Why I Hate Christmas and in her previous relationship), I'm glad to see her open herself up again to seeing someone.

Overall, if you're interested in the journey of Dami and Harim throughout Uni life, heart fluttering crushes, toxic ex's, fake friends, and the struggles of cohabitation, I would highly recommend watching this. But I would also recommend you watch season 1 first.