The artist has two complete image sets, one that's in Korean and the other in English. So I'm not sure why the Danbooru uploads are a mix of both. I also tagged various images in the set with "Yuri" since the artist has the sets tagged as Yuri on Pixiv.

Neither post is on Pixiv anymore, strangely. Dunno what the deal is.

Well at least complete set (even if a mix of two) is uploaded so it's not lost to artist whims.