おしりの肉に食い込んで
段差になってるのたまらん

https://i.imgur.com/xu5rwtx.jpeg
https://i.imgur.com/0vYX6hD.jpeg
https://i.imgur.com/9MxpcSJ.jpeg
https://i.imgur.com/RGqYWe4.jpeg
https://i.imgur.com/yExU9Ot.jpeg