Here are some gifs of the game, there is already a publication of gifs but it is of low quality.

https://rule34.xxx/index.php?page=post&s=list&tags=eroico&pid=0

the game:
https://store.steampowered.com/sub/308271/
https://www.dlsite.com/maniax/work/=/product_id/RJ115470
http://www.kyrieru.com/p/eroico.html?zx=12a3559e71cc86df

here the low quality version:
/g/962131/fd0f8617d7/

more game stuff:
/?f_search=eroico