Could be subconscious, could be what you ate before you went to bed!
EDIT:
OK, here's another attempt:
Mi-mi is you-you. You've moved on to a new version of yourself (who is still inside), but you don't feel comfortable acknowledging that older version. Perhaps going to summer school and taking accounting is something the old you wouldn't normally do? Then again, maybe it's just the last thing you ate before going to bed.