TOHO EUROBEAT VOL.20 秘封ナイトメアダイアリー

Toho Eurobeat Vol. 20 (Hifuu Nightmare Daily) (TOHO EUROBEAT VOL.20 秘封ナイトメアダイアリー / TOHO EUROBEAT VOL.20 Hifuu Naitomeadaiari) is a 2018 Doujin Eurobeat Album released by A-One on Comiket 95 event. It's the twentieth album in the Toho Eurobeat series. This album features Eurobeat arrangements of the Touhou Project soundtrack.

Songs featured are from Violet Detector.