Hey there
From my queue.
You have a pretty unique style of mapping i tried to keep my mod clean enough to not nerf the structure too much.
[Kantan]
00:41:279 (49) - These single upbeat notes seem very sudden and tough for Kantan, You could consider deleting (49) and moving 00:42:858 (52) - to 00:43:450
00:50:161 (61) - And i would just repeat ^ here (00:49:371 - could still be a note though)
01:13:056 (89) - We could delete this and switch 01:13:845 (91) - to D to map the big cymbals instead.
01:51:148 (54) - Again a bit sudden, maybe just move to 01:51:345
[Futsuu]
00:16:608 (35,36,37,38) - Would just go with the same kdkd instead this switch might be confusing in Futsuu
This was a fun diff.
[Muzukashii]
00:37:135 (138) - Seems unnecessary
00:52:727 (205,219) - Since we follow the vocal so strong we could just delete these
01:31:213 (352) - I liked how you let the longer vocal notes ride with a break after them and would continue it here by Moving this to 01:31:213 (352)
01:32:595 - Could add note here then too
[Oni]
00:06:740 (19) - You could consider deleting this, Feels the piano sound is kinda irrelevant compared to keeping following the intro melody.
00:14:240 (64,73,82) - would just make these k's as well like in the next set.
00:36:345 (152,154) - These are too much to my ear
00:39:306 (162,163) - (163) Is the only snare here not mapped with a k, so i would just Crtl-g these.
Good song, nice mapset! Good luck!

You have a pretty unique style of mapping i tried to keep my mod clean enough to not nerf the structure too much.
[Kantan]
00:41:279 (49) - These single upbeat notes seem very sudden and tough for Kantan, You could consider deleting (49) and moving 00:42:858 (52) - to 00:43:450
00:50:161 (61) - And i would just repeat ^ here (00:49:371 - could still be a note though)
01:13:056 (89) - We could delete this and switch 01:13:845 (91) - to D to map the big cymbals instead.
01:51:148 (54) - Again a bit sudden, maybe just move to 01:51:345
[Futsuu]
00:16:608 (35,36,37,38) - Would just go with the same kdkd instead this switch might be confusing in Futsuu
This was a fun diff.
[Muzukashii]
00:37:135 (138) - Seems unnecessary
00:52:727 (205,219) - Since we follow the vocal so strong we could just delete these
01:31:213 (352) - I liked how you let the longer vocal notes ride with a break after them and would continue it here by Moving this to 01:31:213 (352)
01:32:595 - Could add note here then too
[Oni]
00:06:740 (19) - You could consider deleting this, Feels the piano sound is kinda irrelevant compared to keeping following the intro melody.
00:14:240 (64,73,82) - would just make these k's as well like in the next set.
00:36:345 (152,154) - These are too much to my ear
00:39:306 (162,163) - (163) Is the only snare here not mapped with a k, so i would just Crtl-g these.
Some extra stuff for your consideration
Sorry for these bigger suggestions, just something to take into consideration 
Please note that this being a fairly low BPM 3.6* Oni, some of the patterns are making big difficulty spikes in it. To me these feel a bit out of place with the rest of the song. (These patterns are fine as they are but they are just tough)
01:15:424 - A 12 note kdkdkdkdkdkd is hard, you could go soemthing like d_kdk_kdkdkd for example.
01:28:845 - dkkdkkddk also rough for this. At least (429) should be deleted cause of the Finisher coming up.
01:41:477 - Here as well, very tough pattern. (500) at least before the Finisher should go. Both of these 9s could also be done as simple as xxxxx_x_X
01:46:213 (514,525,536) - These also questionable to me difficulty wise.

Please note that this being a fairly low BPM 3.6* Oni, some of the patterns are making big difficulty spikes in it. To me these feel a bit out of place with the rest of the song. (These patterns are fine as they are but they are just tough)
01:15:424 - A 12 note kdkdkdkdkdkd is hard, you could go soemthing like d_kdk_kdkdkd for example.
01:28:845 - dkkdkkddk also rough for this. At least (429) should be deleted cause of the Finisher coming up.
01:41:477 - Here as well, very tough pattern. (500) at least before the Finisher should go. Both of these 9s could also be done as simple as xxxxx_x_X
01:46:213 (514,525,536) - These also questionable to me difficulty wise.
Good song, nice mapset! Good luck!