I am not the protagonist. Everyday life has returned. My big brother and school are just as usual as the new semester begins... except for me, left behind all alone. Sasami-san, whose position has been taken over by Hirume, drifts in a hazy existence. Meanwhile, Hirume begins to realize, "Am I a substitute for someone?" as she notices the artificiality of her daily life. Furthermore, with the return of her father, Shouu awakens to a new conspiracy... Who is being used? As conspiracy and suspicion intertwine, a dissonance begins to resonate—additionally, an evil god creeps into the school, and a game that causes one to lose their sanity begins!? To regain the "power of the supreme god," roll the dice! A grand conspiracy and fate toy with Sasami-san, the three sisters, Shouu, and Hirume. What fate do Hirume and my big brother carry on their shoulders—!? A new story begins in the third-year arc. This is the powerful collaboration of Nisio Isin, the author of "Kyouran Kazoku Nikki" and "Watashi no Yasashikunai Senpai," and illustrator Sae, known for "Usotsuki Mi-kun to Kowareta Ma-chan," marking the seventh installment.