Metadata Source: https://vocadb.net/S/42988
BG: https://www.pixiv.net/en/users/11391415
00:17:973 (17973|0) - the sound you're hiting with the LNs doesn't end there, you could expand an LN like this: https://osu.ppy.sh/ss/17791009/bf78
00:30:014 (30014|2) - You could swap places between the two LNs in this section, and the last LN could end up like this: https://osu.ppy.sh/ss/17790985/3b86, since the sound you're playing doesn't end there.
00:55:001 (55001|1,55430|2,55858|1) - You're not marking any sound with these LNs? if i had to choose I would remove them and add SV to those remaining LN.
00:52:001 (52001|0,52001|3,52144|2) - i heard the same sound, but you put this note: 00:52:144 (52144|2) - in 3 column. could you move it to 4 column. if i'm wrong, you can also tell me why you put that note there.
00:44:144 (44144|2) - you added a note there to mark a sound, but there's nothing here: 00:42:430 and here: 00:42:715. it may be that i'm confused with the sounds that you are marking in that area of the difficulty.
This is just an idea, but as in 00:40:144 (40144|0,40287|0) - you put LNs to mark that sound, you could do the same thing here: 00:40:430 (40430|3,40715|2,40858|0,40858|3,41001|3,41001|0).
00:28:430 (28430|2) - same suggestion, you could do this: https://osu.ppy.sh/ss/17704353/4654 . seeing all the difficulty, i don't think it's a problem to change it that way.
00:27:287 (27287|3) - Same sound as 00:27:144. you could do this if you want: https://osu.ppy.sh/ss/17704344/1be9
good suggestion, but this LN 02:08:087 (128087|2) represents a sound that accompanies vocals. so keep