16 minute DVD 'Christmas Special' is part of Omake supplement to the 2002 Bishoujo game Wind ~A Breath of Heart~. Don't watch it first because it assumes that you already have knowledge of the characters and plot.
The 'Game Demo' is linear, without the ability to make a decision.
The OVA and TV series are produced by differents studio and are completely different. It does not matter which order you view them in since they are independant.
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