Uploaded November 2022 | Updated September 2026, 1 day ago

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This theme is a royalty-free composition.
Plays on 10-12F and 21F.

Original name: Ayatsuri's Red Thread (アヤツリの紅い糸)
Composer: Rengoku Teien (煉獄庭園)
Full archive of their music: archive.org/details/rengoku-teien

Background artist: 肱川＿嵐
Source: pixiv.net/en/artworks/60005894