what do you have NFHS rule set

[Insane Blue]

Bases loaded and no outs. B4 is at the plate with a 2-2 count. The next pitch is called a ball. Thinking it's ball four, B4 starts toward first base. The base runners follow suit, touching their next respective base, including R1, who touches home. The entire time, the plate umpire is holding up the correct 3-2 count. The first base coach finally realizes the mistake and the batter returns to the plate. All runners follow suit, returning to their original bases. The Defense makes a play on R1 who had already scored.

What do you have??? and what rules or casebook play supports it.