Tōmin-chū no monsutā o sensei kōgeki de hakai suru keikaku ga jikkō sa reru Chū, gamu wa ningen to kankyō no baransu ni tsuite aratamete kangaeru koto o yoginaku sa reru. Hiroya wa kore made no kōdō no kekka ni chokumen suru.
Gamu is forced to consider the balance between humans and their environment again as a plan is enacted to preemptively destroy a monster that's currently deep in hibernation. Hiroya is faced with the consequences of his prior actions.