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新Live2D（2019年12月） お披露目予告
The official announcement scheduled the reveal for 2019-12-01. The announcement alone does not confirm that it took place, so this remains a record of the plan at that time.
Source1Open sourceCOVER official launch announcementprtimes.jpNew Live2D (December 2019) Announcement previewイノナカミュージックからホロライブへの移籍
The official announcement records the transfer to ホロライブ effective December 1, 2019.
Source1Open sourceCOVER official announcementprtimes.jpTransfer from イノナカミュージック to ホロライブ