Also known as: 謎スケート
A promotional video released at Anime Japan 2016 to announce the Umamusume project. One infamous scene includes Symboli Rudolf (Umamusume) and Oguri Cap (Umamusume) having an ice skating fantasy.
The video is also infamous for featuring Prototype Designs of several characters which were ultimately not released or whose reveal was significantly pushed back; namely Deep Impact (Umamusume), King Kamehameha (Umamusume), Orfevre, and Buena Vista.