Hachi-One Diver (2008)

I think that both of these would appeal to the same kind of audiance. so if you like one you would like the other.

Both are about gambling with risking something big in every game. The couples on both dramas have contrasting personalities. For Hachi One Diver, the girl is more composed while the guy is kinda funny. While in Liar Game, the girl is the clumsy one, while the guy is always cool.