In her report, Sasami explains how she was trained at the Tsukuyomi Shrine to inherit Amaterasu's power, which had been passed down from her family through incestuous means. She soon began to question her life after discovering the internet, eventually deciding to run away with Kamiomi. As she writes her report, Sasami discovers that a third arm has grown out of her chest, soon discovering it has a personality of its own, which tells him Kamiomi plans to return to the shrine in order to protect her from hunters who want Amaterasu's power. Struggling against the sunlight, Sasami comes across Tsurugi, who brings her to Tsukuyomi Shrine and reveals herself to be Amaterasu herself, who gave her power to Sasami's ancestors long ago.
八百万の神々と最高神の関係について、自宅PCで鎖々美レポートにまとめるささみさん。最高神のちからを受け継ぐ『月読一族』の存在と、これまで自分が置かれてきた環境や修練の日々、そして、お兄ちゃんを連れて自分がそこから逃げ出したこと…。そんな自分自身や過去を振り返りながら、ふと胸元に違和感をおぼえたささみさんが見たものは、信じられないような光景だった…！
Sasami continue d'écrire ses comptes rendus, et dévoile un peu plus son passé et sa relation avec le dieu suprême Amaterasu. Lorsqu'un troisième bras lui pousse sur la poitrine, Sasami comprend qu'une altération en est la cause. La jeune fille décide de faire avec, jusqu'à ce que ce troisième bras échappe à son contrôle...
