On 2/15, HaccaWorks* is releasing the supplement guide to their game Akaya Akashiya Ayakashino. It will contain a visual guide and include detailed information about the characters, setting, a capture guide, and an illustrated side-story. It’s 200 pages long and includes some color illustrations.
It will be available for purchase on several websites, including Animate, Stellaworth, and Toranoana. So international folks are likely to need a deputy/forwarding service at this point. Mine is already ordered from Toranoana which will supposedly include an extra postcard. I can’t wait~