Summary:

When Ilya moves to the Centaurs, the number 81 is already taken. So, in true Ilya Rozanov fashion, he picks the number 24. People think he's just being an asshole, which is true, but he also does it to have Shane with him all the time.
Of course, years later, Shane transfers to Ottawa. And lo and behold, the player who had number 81 retired, so when Shane has to choose a number?
81 is available.
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Or, Hollanov end up switching numbers and driving each other insane.