The way Yandere Simulator handles sanity through music is lowkey genius. The Schoolday theme starts out as this bright, bubbly anime school tune, then the Yandere Mix warps it into something unsettling without changing the melody.
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Just the texture shifts. The Desolate Mix strips everything back to hollow reverb and it genuinely made me uncomfortable. Basement goes full dark ambient, like you walked into a different game entirely. And then Tsubasa wo Kudasai hits you with this sincere Japanese vocal track that almost feels too pure for this game.
The whole soundtrack is basically a mood spectrum from cute to deeply wrong. If you like games that mess with tone, the music alone sells it.