Alot of the images are APNGs but it seems they don't stay animated when viewed on the E-Hentai site. (I presume due to being resized) If you download the full images from this gallery if logged in and view them in a way that supports it, it seems to work there.
maybe you should delete this galary. before years ago this creator guy got very upset and hide himself along 2 years when his Amagami works are uploaded here. it seems he endured first chinese pirate, but second korean pirate did the heist again even he warned about the piracy in his pixiv. I am fanboy of his since his first pixiv activity so i was also very frustrated he stopped making koikatsu scenes. 2 years of no activity but now he came back with fanbox and he is full swinging. plz do not bother him. i know me myself is a pirate too but well you know.
beside you can view animated images in his pixiv for free, so why did ya bring this un-animated images here? you should encode those in GIFs at least bro.
Because the set is poorly tagged so it was hard to find and it's on a site that requires an account to even view it. (Pretty much the only FE tag these images have on Pixiv is Celica, even the generic "Fire Emblem" tag won't show them.) I don't support piracy of people's stuff, this was to make it actually findable for most people and not require an account to view. (since all of these images can be viewed for free on Pixiv like you said.) Thanks for the advice on gifs but uploading them as gif format doesn't seem to work. (I get a generic "corrupt, incomplete, too large, or not an accepted image file." error.)
wow so you are encouraging artist through your grand theft artwork! how noble of you! you stole his works instead of commenting to the author, "It would be nice to modify the tag." and you think it's better to browse a pirate's fence than to create a Pixiv account. ...wait, was creating a Pixiv account charged me? no i don't think so. and I confirmed now, all of the creator's works are TAG FREE. anybody can edit the tags if they wants. of course u could edit the tags if you really want to help the creator. you are just a little pirate who collecting Fire emblem tresure into. Oh, my God. I'm a pirate too, so I cannot blame the piracy here, but it's amazing to see a stupid pirate like you frustrating my favorite captain.
The images are free, piracy would be if I was uploading the Fanbox paid versions.
I'm not passing this off as my own, I'm merely hosting the free images on a different site (without account wall), with links to the original creator's pages.
I feel like this is akin to saying that hosting a demo/trailer of something on a different site is the same as hosting a pirated version of the full thing.