I've seen people say it before, but they're right: if you watched 2Moons and liked the cast, then you're gonna L O V E Gen Y.
However, if you didn't it doesn't matter. There are some references to 2Moons, but you'll still understand everything even if you didn't watch it AND you'll love the cast, I promise.
This is one of those dramas that, when I finish each ep, I get a warm feeling in my chest. It's quite soft and funny, the levels of toxic topics (homophobic comments, etc) are reeeeally low compared to basically any drama I've watched, and the cast is just too adorbs. They're giving us all the cute scenes we could've had with MingKit in 2Moons s1 but with MarkKit and I love it. Also, not knowing what tf is going on with the secondary couples? I love it. It's fun to try and guess who's gonna end up with who instead of knowing things from the very beginning. Really, amazing.