I don't see any gloves of any kind.

See her wrist at the top left? Her arms are raised.

I've seen the anime and know it's Mitsugu, but in this gif, there are no identifying features that point out who these breasts belong to.

Tag what you see, not what you know.

Her left underboob bulges randomly in a few frames.

sgcdonmai said:
Tag what you see, not what you know.

While this is the case for most general: tags, I'd think that data like copy: and char: are exempt due to their value in searches.