Hello N-Forza!
Can you buy some stuff in Village Vanguard shop in Ikebukuro? They are holding a limited time "pop-up store" from October 20th to November 4th, but the thing I need the most will be on sale only from October 27th, so I guess there's no need to go before that.
Information about the store and the items:
https://lineblog.me/machigerita/archives/1062439829.htmlItem list:
"Pizza Bear" hoodie (or the other one, in case this one is sold out) - ¥6000
Phone case - ¥3000
Mobile battery - ¥4000
Keychains - all 5 types, ¥800 each (people say that 2 types are already sold out, hope they'll restock later)
The stuff that will be on sale from 27th:
Music download card - ¥1500
Gacha buttons - ¥300 each (I don't know how many types will be there, so let's say 3 for now; I'll notify you if I have more information)
With every ¥5000 spent they'll give you an event ticket, but I don't really know what to do with them.