Equation (get out what you put in)
equation (get out what you put in) is a standalone illustration by beili. It originally ran in Issue 49 at http://s2b2.livejournal.com/276190.html, and is mirrored at http://www.shousetsubangbang.com/mirror/equation-get-out-what-you-put-in/.
The title is from "Heart Beats" by Hey Marseilles. Many thanks to Nanaki for throwing song lyrics at me and helping me pick it out!