When choosing clothes for Rena I choose kimono, but most of the scenes she wears the witch clothes.
And for the map system, are all events missable or can you do all of them on each day in the later updates.
The clothing choice is more of a preference, with it being reflected in some scenes but not all. I plan to add more scenes with clothing style variations, though.
Most of the map events can be experienced on later days. The only ones that are missable/time-sensitive are the ones with an hourglass icon next to them. As long as you pick those events before they disappear, it's possible to see all the map events in a single playthrough.