during the final arc against whatever the big bad is, mc-tan finds that no matter what she tries, nothing she does seems ill enough to win, jay-z sees this and decides she hasent become truely hard yet, and decides to send her alone on a sabbatical "without me or noone small sonin you, yo".
with the fates hanging in the balance, mc-tan must find the answer she needs before time runs out, it is during this journey she finds the immortal shadow, where she must decide if she has what it takes, or turn back forever.
http://www.youtube.com/watch?v=r-1ZaMe72ZU>yfw its also a deconstruction.