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Release Date: 2026/08/15
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iTunes Store • J-Pop TOP SONGS • Thailand • TOP 72
![Ayano's Theory of Happiness (New Recording) [Instrumental] Front Cover](https://tcj-image-production.s3.ap-northeast-1.amazonaws.com/u596323/r1904106/ite1904106.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJV4VIS2VN3X4CBGA%2F20260904%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20260904T192144Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=db14b16839d232cccf89fe01899ace9019a3aba5983c0a609970eecca070e323)
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