SPOILERS
I finally got around to playing this. I saw this game in December 2020, during my first year at college. It was also the same day a friend introduced to Irisu Syndrome. Though I wanted to try this game immediately, I was worried about possible spoilers for Irisu if I played this game first, so I put off playing Usagi Syndrome until I was actually finished playing Irisu ...and by finished, I mean I was going to keep playing Normal Game until I was able hit 100. I then soon realized that it was an impossible feat and I only ever made it to 90, but when I realized that, I was already playing the game for over 2 years. Anyways, it's my last year at college, and I thought I'd play the game during my 3rd year anniversary with the Irisu.
The game certainly got freaked out over the many stuff in the game, especially the piece of paper that randomly appeared at the school. Also I think I might have accidentally caused the fake Windows error message in the menu containing the "extra" to show up...somehow. I'm not sure if that's intentional, but it certainly caught me off guard. Finally, that darkened image that was hiding in pure black also scared me.
Loved your game AlfredPros, and hope to see more of your works in the future!