豚がいるから解りやすいかな。
http://illust-uploader.mmoloda.com/image/5719.jpg
http://illust-uploader.mmoloda.com/image/5720.jpg
http://illust-uploader.mmoloda.com/image/5721.jpg
http://illust-uploader.mmoloda.com/image/5722.jpg
http://illust-uploader.mmoloda.com/image/5723.jpg
http://illust-uploader.mmoloda.com/image/5724.jpg