This is from a neat Japanese independent animation called “Cirque le coeur” (available on YouTube). A seemingly innocuous circus tent holds a marvelous world of enchantment for our morose anime heroine…
…but as she learns too late, appearances can be deceiving. 
-ibcf
Everybody check out this thread that ibcf posted! Those of you who browse “backstage” might have overlooked it, because this is the first comment.