I've been playing with ComiPo! manga sequencer software(so called as 'music sequencer' application; see this video for the basic concept) and really, it's quite fun! For me as an artist, it does some difficult elements(such as changing three-dimensional viewpoint of characters) so much easier than actually drawing, whereas some elements still look awkward and unnatural. But I think this software has so much potential, considering more data are planned to be added in future update.(I certainly want more wardrobe data-- I'll definitely buy that set!)
Anyway, as my practice I made this 4-panel manga with current data inventory-- I hope the characters look as Harry and Draco!