Great art and story. Music and audio design is fitting as well.
Gameplay is fun until Doki's duel. The distraction is makes the fight a lot harder than it should be and Doki's reaction time is very fast.
I managed to beat the game once in Easy mode after trying a bunch of times in Normal but I had turned off the dialogues so I missed the whole ending. Then I played again with dialogues but pressed the "skip" button to go faster.
Managed to beat the game a second time but noticed a bug with the dialogues playing twice now. And when I quit to the menu, both the menu and the dialogue showed at the same time. (see screenshot)
I feel Doki's duel could've been tuned a bit more to the easier difficulty (on her reaction time), since the distraction adds a lot of difficulty to that duel. It would be interesting to record play data from multiple people (at least a dozen, from different skill levels) to see what's the average reaction time when there's a fake signal and use that for tuning.
The game is supposed to be fun for the players, but when it's tuned too hard it's just frustrating and leaves a bad taste. Remember not everyone has quick reflexes but everyone wants to enjoy a fun game! :)
Overall, it's a nice game. Good job, team!