I am afraid that you cannot purchase this special packaged ticket online.

Please reserve a round trip ticket from Shinjuku or Shibuya to Fuji Q Highland on this website, and purchase Q-Pack ticket at the ticket counter when you pay for your reserved tickets at Shinjuku Expressway Bus Terminal.
We highly recommend that you reserve seats in advance. The seats may not be available when they are fully booked.

Reserve tickets for Fuji-Q Highland.