all the chocolat Freude novels(1-5) have also been missing in action since the dawn of time

https://www.melonbooks.co.jp/detail/detail.php?product_id=136799 everything is sold out

I think there is a copy on doujinrepublic though( they have worldwide shipping) https://doujinrepublic.com/product/product_page_2000410325.html

if the other novels are any indication I would guess half of these pages are artwork (so around 50)