I suppose ep10 is the end of the first half. Feels weirdly fast since they've really just defeated 2 MOTW and the villain lady.

The lore seems to be implying that MC's dad wasn't the only Xtreme Vanguard in the future and the Xtreme Vanguard users were all summoned from the past like a reverse Kyle Reese situation. The world-building seems large for a small toku project like this, maybe they are setting up their universe for multiple Xtreme Vanguard shows.