https://static1.e621.net/data/65/7e/657e93554c1a6df6650050bb501e5618.webm
https://e621.net/posts/2721717?q=zero-sum
- https://static1.e621.net/data/62/cd/62cdf3dce398bba0f63ef1624a30257f.webm
https://static1.e621.net/data/d0/8e/d08e837154f0370c9c1ce916992dbf8a.webm
https://e621.net/posts/2436244?q=zero-sum
https://static1.e621.net/data/e7/3a/e73adc5501fa6a6b2051adc0121d8194.webm
FULL-https://static1.e621.net/data/0a/b2/0ab26d1393dd9415212f8cd154baf264.webm