Slow-intro songs aren't exactly the hottest topic these days, but if you sit back and relax, I think you'll find Kisnou's latest effort to be quite worth it.
The vocals don't kick in until just after the 1:30 mark, but by the time they hit Kisnou has gotten you so ready that you're able to just melt into them. And boy oh boy are Amethyst's vocals melt-able.
You can grab this as part of an album called Glow To Last, available here.