literally
still great even if it was playing fucking everywhere to the point getting sick if it
iirc sana had a fucked up back as well, making the idol stuff difficult too.
can't remember the age of the onion, but if she really is a reformed hikki finally "living life" wouldn't be that uncommon, even without doing the same thing for the last 6 years which can feel stagnant or burn you out (especially when started early). that's with your perspective changing over time inevitably, you'll have a different outlook on life in your 20s/30s/40s.
or
someone managed to mating press the onion and knocked her up