Inamoto-san attends high school with Yomogi Asanaka and Yume Minami. Initially blending in as a background classmate, she grows increasingly observant, noting Yomogi's frequent absences and shifting behavior, often sharing these observations with her friend Chise Asukagawa. Her story centers on a romantic interest in Koyomi Yamanaka. She persistently seeks him out on his solitary rooftop retreats, her efforts culminating in a romantic relationship where they become boyfriend and girlfriend. During a kaiju attack, the mecha Gridknight plucks her from danger, an event leaving a distinct, though largely internalized, impression. Later, she visits Koyomi when he is hospitalized after sustaining injuries. The narrative focuses on her observations of classmates, her developing romance with Koyomi, and her kaiju rescue experience. Details about her background or family life beyond her school activities and relationship with Koyomi remain unexplored.