The three relics needed to revive Hololive Summer have been taken, and even YAGOO, the head of Hololive, has vanished. When staff member Friend A (A-chan) becomes aware of this, the hololive members are gathered and sent on a mission to locate the three treasures, save YAGOO, and make sure this year's hololive Summer can take place. The eagerly anticipated comeback of Hololive Summer... Will that hope be dashed once more this year, though? Will the holiday spirit once more be stolen? this season... Start of the girls' mission.