Oh, no, we don't hear Maria singing... That's just me speculating XP Allen sings a bit, though! And his seyuu sings the whole song in a more girly-voice and me, being dumb, didn't know it was her and immediately went all "OMG, it's Maria!!! *brain explodes from theories*"

But watch it! Despite the fillers (some of which are actually funny and we get Kanda's story from the novel too!) it's actually good!