Sega tweeted on Monday that they are releasing a new 3DS Home theme for their latest game Hatsune Miku: Project Mirai DX on Tuesday. Tuesday seems like an odd day for the release of a theme since Nintendo eShop updates happen on Thursday in North America.
Check your theme shop later today.
There's a new 3DS theme coming tomorrow. Stay tuned especially if you're enjoying Hatsune Miku: Project Mirai DX.
— SEGA (@SEGA) January 4, 2016
UPDATE: SEGA has released the theme for Hatsune Miku: Project Mirai DX. It’s now available for download and retails for $2.59 CAD.