It might not actually be a clash. Maybe Hotaru is just hitting the MTW's super armor, and that lets you cancel into j.D? Except normally you can't go straight into j.D unless it's off a clash.
> If the clashed move has multiple hits and you do not cancel your attack, the latter attacks will come out.
Or maybe this is the relevant part. MTW has like 100 hits, Hotaru clashes with just 1 and before you know it that window has closed.