Responses
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Essentially blonde girl is the only alive person working there until black bob cut girl joined. Later, black bob cut gets lured by a ghost pretending to be blonde girl and is killed (her corpse in the machine). She continues working in the factory feeling a little off but not knowing what happened and blonde girl is left as the only living person (probably cuz she can recognize ghosts)
I didn't quite understand the ending of the second loop with the factory story ┑( ̄Д  ̄)┍