Both stories have the same actors, besides one, but overall it is pretty similar stories. I think people love the cast from the 2Moons and they decided to do a serie based on the same storie.
The characters have same names, or similar. I just wish that Mark could be called as Ming as in the 2 moons with the same names. But, oh well, I think this series has a lot more passion and we could see a lot more of the acting of each actor.
Who liked the 2moons, DEFINITELY will like Gen Y, it as more romance.
I RECOMMEND FOR SURE! ?