https://e621.net/posts/2436244?q=zero-sum
https://static1.e621.net/data/f9/6f/f96f22e5f5a82bb27379f4ae74ecccf5.webm
, -, , + , .Net, . , . , ..
https://static1.e621.net/data/63/36/6336a4e2b39507e7d883aa409cd4af62.webm