It is creepy initially, but like I said, they did it in good taste. The brother and sister in the anime hadn't seen in eachother in over 10 years and grew up in separate houses. They end up meeting by accident (and not knowing it) and go on a date. It's very angsty from then on, but the drama is pretty good. You end up feeling bad for them. The show isn't for everyone, but if you have an open mind to the situation you could like it.