https://www.dlsite.com/girls/work/=/product_id/RJ01241687.html

[Content]

This is a compilation of the spin-offs of "Hidamari no ryuu, yugure no karasu" which was published in 2021 and 2022 as part of a paid plan on a support site.
It's 93 pages long (including a cover and 3 administrative pages) and includes 19 short comics and illustrations.

The main story is available in its entirety on pixiv: https://www.pixiv.net/user/55438890/series/98693.
The omnibus version, which includes revisions and new illustrations, is available here: https://www.dlsite.com/girls/work/=/product_id/RJ01137351.html
This version - https://e-hentai.org/g/3692031/81983f58b9/

[Characters]

Touka Hibana:
She was injured and near death but was saved by Karasutani.
She is currently staying with him and seems to trust him.
She is always in good spirits.

Karasutani Shinkuro:
A doctor who specializes in humans and helped Hibana.
He has trouble with Hibana but he still looks after her.
He wears a mask for various reasons.
He seems to have some kind of connection with dragons.

Base +28, nuts987 +14