All the character illustrations for the Toho Project fangame "Ephemeral Unnatural Balance", created by ExPorygon. Features EX-Koakuma as the main villain, and Rin Satsuki as the main heroine.

A demo of the game containing the first three stages can be found at:

http://porygonproductions.tumblr.com/post/132773440145/eub-demo-release