Ratio Clavis

The summer festival is over... and the tour is starting soon...! I can't wait for the merchandise to come out... But, come to think of it, I still haven't gotten the cassette tapes, and the planetarium merch is also not here yet... Will they all arrive one after another starting in October? I'm super happy about it, but if I buy the tour merch too, my house will be overflowing with goods~