>>60248180In the first part of the MV she throws the rock and it transforms into a dream world in which she is alone without a name.
The lantern lights her way out of this world. She finds herself and is no longer alone as it leads others to her.
The rock breaking is what really happened after she threw it, it symbolizes the dream (nightmare?) ending or rather breaking apart.
The lantern snuffing out means it is no longer needed to light the way and guide her.
The fish is literally out of water but we immediately transition to the ocean with many fish swimming along with a whale. Both instances symbolize Mumei and Hoomans.
Lastly: the girl. It's Mumei, anon.
She used to be mumei (nameless) and now she will go on as Mumei (Vtuber).
This is my schizo analysis and I will die on the hill I have made.