Kaori Oda solo + collabs (non-YK / non-Sound Horizon)

[grunty]

I believe it's not like Kajiura's, as Shimotsuki's can be translated/interpreted. Also pretty sure she has several projects with different conlangs. Like, Lip-Aura's is different than Tindharia's.

It wasn't for a game. I want to say Lip-Aura started as a joint circle effort tieLeaf with novels, dramas and music.

I could also be totally wrong, love me some Shimotsukin but it's been way too long since I was invested in this...

 

[grunty]

Just to add (as I looked into it just a tiny bit more after waking up)...

All the lyrics (and I believe planning) for the Lip-Aura series, or more accurately Lag-Quara Project, are by Nao Hiyama.

If you care to go on a journey, I THINK these are the music releases in release order (as of today):

月追いの都市 (2005) (youtube)
Lip-Aura ～その手が象る世界～ (2007) (song1 + song2) <- single isn't on youtube, links from tieLeaf best album
ツイソウの窓 (2009) <- 1 song, the song is also featured on the 2014 album
花想少女~Lip-Aura~幻想歌曲集 (2011) (youtube) <- which is where your Kaori song is from
落日の迷い子 (2012) (song) <- original song from tieLeaf best album
捻子巻く月 前奏曲～日溜まりの檻～ (2014) (youtube)
翼の降る王国 (2016) (youtube)
書き溜めた余白 (2021) (song) <- 1 song, not yet featured on an album afaik
音なき森のイヴ (2021) (youtube)
花枯れの魔女 (2022) (youtube)
書き溜めた余白 (2023) (youtube)
弔いの鎮魂花 (2026)

花想少女~Lip-Aura~ also has a drama CD twin release, which incorporates its respective songs.

Can't really help with the text and visual side of things. I may (or not) have some scans of stuff that came with CDs from when I was into the doujin scene but I doubt it's complete.

Edit:
Added youtube for everything but the latest release. It's been ages since I listened to some of these. Still great if you like Shimotsukin.