They are almost the same with the way the love triangle goes. In When Love Walked In There are three main dudes and 2 of them like the same girl. The one the girl is going to be with has a friend that likes him and she is a sister to the other guy that likes the female lead. In moon river it is sort of like that but the girl who is female lead has 2 guys who like her and out of the two guys the third one is the one the other girl likes. She likes the male lead that would not be with the main female at thee end of the day. Kind of confusing but if you watch you will understand.