Don't try to challange D'spiral or you get another headless route like Mami.
Demo: http://blackcompound.blog.2nt.com/blog-entry-107.html
Patreon
tier 10 : https://www.patreon.com/posts/february-2022-10-61942005
tier 20 : https://www.patreon.com/posts/february-2022-20-61942105

SubscribeStar
tier 10 : https://subscribestar.adult/posts/516888
tier 20 : https://subscribestar.adult/posts/526606

Fantia
https://fantia.jp/posts/1106521

Buy the CG pack in DLSite / Gumroad

2019 . 2 :
https://www.dlsite.com/maniax/work/=/product_id/RJ278039.html
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE278039.html

2020 . 1 :
https://www.dlsite.com/maniax/work/=/product_id/RJ296271.html
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE296271.html

2020 . 2 :
Cut version :
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE318803.html

https://www.dlsite.com/maniax/work/=/product_id/RJ318803.html

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