- https://static1.e621.net/data/11/70/1170b3dafdb34593fe4829922ae44c2c.webm
https://e621.net/posts/2436244?q=zero-sum
FULL -https://static1.e621.net/data/b5/89/b589cd800fe90cfcedc802caaa948612.webm
https://static1.e621.net/data/89/a7/89a760b6fbc6213bee4da4da6cfda365.webm