I really like Mutekina Heart. At first I didn't really care about it, but it takes some time to grow. The two composers of this song also wrote FUTURE KISS, touch me!, Catch, Watashi no Shiranai Watashi and PUZZLE (I might be missing some). A few of these are one of my all time favorites, so it doesn't surprise me that I like this song, too. STAND BY YOU is wonderful. Overall, I'm very satisfied with this single (except for maybe the covers).