All five of NALU's Roy and Juno image sets together.

https://e-hentai.org/g/3224014/a40fd2cff1/ AU set mentioned in part 7.

According to latest fanbox, chronological order is:
1→4→3→5→2→6

Sadly Part 6 has no English version right now.

(So for English: 6, 19-37, 11-18, 38-61, 7-10 and finally 154-222)

Pixiv posts:
https://www.pixiv.net/en/artworks/112678762
https://www.pixiv.net/en/artworks/115471739
https://www.pixiv.net/en/artworks/116948023
https://www.pixiv.net/en/artworks/122797141
https://www.pixiv.net/en/artworks/126608687
https://www.pixiv.net/en/artworks/133134806
https://www.pixiv.net/en/artworks/136945508
https://www.pixiv.net/en/artworks/151537084

Fanbox posts:
https://na-lu.fanbox.cc/posts/7351828
https://na-lu.fanbox.cc/posts/6850583
https://na-lu.fanbox.cc/posts/7614134
https://na-lu.fanbox.cc/posts/8611094
https://na-lu.fanbox.cc/posts/9273897
https://na-lu.fanbox.cc/posts/10265052
https://na-lu.fanbox.cc/posts/10831437