<--- from "Knights of Ramune"
>>1321818well I know the post's months old, but since it had been endlessly requested, source is "Mai otome Zwei", I think the scene is from an omake:
http://www.anime-fanservice.org/coppermine/thumbnails.php?album=809Oh and it's already been answered, but OP's gifs come from "Aika R-16" (prequel TV series to the Aika OAV, which are highly recommended for any /e/ lover)