This VN has some of it's characters doing dogcosplay wearing a dog costume or dress.

Key points of dog cosplay are (not all necessary for tag to apply): dog ears (headband, hood, hat, etc...), dog tail, dog paw gloves, a dog themed costume (leotard, stocking, gloves, etc...) resembling dog skin.

In case of sexual roleplay use it in conjuction withpetplay.

Dog costume:
Example
Dog cosplay with sexual petplay:
NSFW Example 1
NSFW Example 2