Are fanfictions actually still a thing?
In any case, these drawings were made for a fanfiction. For anyone who's interested, here's a link to the fanfiction. The pictures were used in chapter 5.
https://archiveofourown.org/works/29880642

The pictures are from Popiiporo and were commissioned by CorruptionHen (https://www.pixiv.net/en/users/3424430 / https://twitter.com/corruptionhen).

Here are all the important links to the artist.
popiiporo
https://twitter.com/popiiporoo
https://www.pixiv.net/en/users/48453371

Source
https://www.pixiv.net/en/artworks/99557064

Visual changes in eyes:
- Change in color (both iris and sclera)
- Visual trails from eyes (a type of aura?)

Base +6