Wave, Listen to Me! 10

Mizuho's concerted efforts to help advance Minare's career lead her straight into a trap laid by a dark shadow in her recent past. Stranded in a hut in the middle of a blizzard, the assistant director must keep her wits about her if she is to brave the wilderness to return home. Minare and Madoka are already en route as would-be rescuers, but who is the "Mizuho" that keeps messaging them?