SETOUCHI AREA PASS - RESERVED SEATS ON ORDINARY CARS (unlimited times)

Hi,

1) The term - Seats must be reserved at the ticket office from the 7th booking. If I use on 7th reserve seat need to pay additional cash for reserve seats?

2) I will arrive at Kansai airport to Okayama at Oct 2025. Use Setouchi Area Pass - I need to take train Limited Express Haruka to Shin-Osaka & train Shinkansen Shin-Osaka to Okayama. The reserve seat count use as 1 reserve or 2 reserve seat in 1 trip?

Regards,
WY