Very nice game, hopefually somebody picks it up for translation at some point. There isn't particularly much of text. The game has 20 stages, each with 2 unique animations, for 40 animated sequences. There are also 8 "trap notes" some with unique animations, so when it comes to volume, the game definitely delivers.
If you want to go through it right now:
Input is either left and right mouse button or right and left arrows. "ghostly"/"fierly" notes are illusion notes. Hitting them doesn't kill your combo or give you a negative score, but plays a distractive cutin+asmr. In later songs you might sometimes see a cutin on Aria's face withher eyes glowing, the screen gets blue border at that time. If you hit trap note during that time, instead of usually slight distraction Aria will cover half of the beatbar and will squeeze her tits every whenever you click, covering the middle spot and making the game basically impossible.
You can progress main story (days 1-10) by just attempting the stages.
Once you finish day 10 and even a single stage 1-10 doesn't have at least 100% target score, you will reach bad end (ending 2) and unlock day 11, which is start of cum pet afterstory/bad end
When you finish day 10 and all stages 1-10 have at least 100% target score you will get good end and unlock day 16, succubus slave afterstory.
For good/bad end what matters is your last score, since it updates every time you clear a stage.
When progressing postgame (days 11-15 and 16-20 for either ending), you need to hit the target score to continue.
After clearing all stages you unlock ability to play any music on any stage, ability to autoplay, and ability to skip to victory scene after the stage.
Also, in galery each scene has an additional cum animation in the 2nd angle that the game sometimes shifts to. All scenes have that 2nd angle but you never cum during it in the game.
View attachment 4502384
Attached full save, put it in アリアサキュズム_v1.1_Data
Played on hard and didn't bother FC/FPing the stages, so if anything is exclusive to hard difficulty and you won't unlock it on easy/normal i don't know, and if there is anything except achievements locked behind FCing/FPing entire game, I wouldn't know either.
