Quite pricy doujin for something from suruga-ya, but imo worth it. Page 14 cracked me up - especially Kuroneko. I'll try to find F/SN books from this circle, but I guess it won't happen very soon.
It was indeed well worth it. Ayase and Kirino don't get enough love - even through novel inception - and Ruri trolling Kirino over this (lol'd at her umadsis :3 face) was fucking hilarious.
Thanks for buying this book and sharing it with us, HNTI!