A collection of artwork form the artist shiruhiya (しるひあ), sourced from their Pixiv, Twitter & Skeb accounts. The ordering of the gallery goes as follows:

Images 1 to 53 are from their Pixiv gallery (as of the uploading of this e-hen gallery), from earliest to latest.
Images 54 to 132 are from their Twitter page (again, as of the uploading of this gallery), from latest to earliest.
Images 133 to 135 are from their Skeb page (Once again, as of the uploading of this gallery, though this one looks like it might've been abandoned for a while), from earliest to latest.

Links to their pages:
Pixiv - https://www.pixiv.net/en/users/13405441
Twitter - https://twitter.com/shiruhiya
Skeb - https://skeb.jp/@shiruhiya

Enjoy!