The terms "Robin" and "Bending" are frequently used in the context of 3D modeling and rigging (e.g., character "bending" or skeletal deformation for an avatar named Robin).
It could be a fan-made collection of images or videos, compressed into the .7z format to save space. Technical Details of the File Format Robin_Frnd_Bending.7z
Since the file ends in , here is what you need to know to handle it safely: The terms "Robin" and "Bending" are frequently used