To open serpent's mouth...
http://blackcompound.blog.2nt.com/blog-entry-158.html

Support to get them at...

SubscribeStar
tier 10 : https://subscribestar.adult/posts/2361124
tier 20 : https://subscribestar.adult/posts/2370619

Fanbox
tier 10 : https://blackbible.fanbox.cc/posts/11482618
tier 20 : https://blackbible.fanbox.cc/posts/11482702

Buy the CG pack in DLSite

2024 .1 :
https://blackbiblecompound.itch.io/r18g-cg-ongore-2024-first-half
https://arbum.art/p/019233f4-acbd-b8b1-fca7-1708732a754f
https://www.dlsite.com/maniax/work/=/product_id/RJ01266749.html

2024 .2:
https://blackbiblecompound.itch.io/r18g-cg-ongore-2024-last-half
https://arbum.art/p/0196a96c-5442-a169-f153-869fb63b273c
https://www.dlsite.com/maniax/work/=/product_id/RJ01370436.html

2025 .1 :
https://blackbiblecompound.itch.io/r18g-cg-ongore-2025-first-half
https://arbum.art/p/0199f03f-587e-67fd-05ce-b6e98a3c2a80
https://www.dlsite.com/maniax/work/=/product_id/RJ01487257.html

Blog : http://blackcompound.blog.2nt.com/