TOHO EUROBEAT Hi (TOHO EUROBEAT 秘) is a doujin album by A-One released on 2016-05-08 (Reitaisai 13). It features vocal and instrumental arrangements of themes from Urban Legend in Limbo, Ghostly Field Club, Changeability of Strange Dream and Retrospective 53 minutes. Track 09 "Uncover the Universe (Eurobeat Style)" from the album was also arranged in a Rock style by tomoya of TUMENECO on the album エンドレス・リピート.

Song: Purest
arrangement: Odyssey
lyrics: T.Stebbins
vocals: T.Stebbins
original title: 最も澄みわたる空と海
source: 卯酉東海道　～ Retrospective 53 minutes