I thought it had the same touchy feeling at a few parts, but maybe not as good of a storyline, but i loved the storyline still. jsut that i wish it were longer, lol, but that goes for any anime that ppl like.
both about a guy who meets 12 Girls.
the girls start too like him ,and so on
the Differences between Sister Princess and Futakoi
Sister princess dosen't have twins and Futakoi is about Twins.
But they Both Have very heartwarming characters