This DLC grants access to 10 songs including Touhou original "A Soul as Scarlet as a Ground Cherry"

A Soul as Scarlet as a Ground Cherry (Original Touhou Song)
New Arrangement by Tamaonsen
Flame of Nuclear (Dankagu Edit)
Sunlight Diamonds (Violet Delta Remix)
Bang Bang!
Vampire Mate
The Replica Sneers
Night Falls　～　Evening Star LSDj Remix (Dankagu Edit)
Lunatic Princess
Who killed U.N.Owen

Release is scheduled for August, 2025.
Check out the official page for details on the songs.
Official Page: https://danmaku.jp/en/