Aoi Kanzaki is a 16-year-old high school student with brown waist-length hair, blue eyes, and a height of 156 cm. She weighs 43 kg, with bust-waist-hip measurements of 87-54-86 cm and an E-cup bust. She typically wears a school uniform and a ribbon hair accessory.

As childhood friends and next-door neighbors, she shares a close bond with Kurusu Akito, walking to school together daily. Known for her friendly, kind nature, Aoi enjoys popularity at school, earning the title of Miss Mikage, the school idol.

Her admiration for Akito originates from him saving her in their youth. This dynamic shatters when an unknown organization targets her, coercing daily sexual encounters with physical education teacher Shoda. Though initially non-consensual, Aoi gradually develops unexpected enjoyment from these acts.

The situation strains her relationship with Akito, who uncovers the truth. Aoi explicitly rejects Akito, declaring preference for Shoda’s "thick and hard" presence. She embraces masochistic excitement and abandons her former romantic feelings for Akito.

Key events include invasive physical measurements disguised as school duties, urine examinations, and being taken intoxicated and stripped to Akito’s room. During a confrontation, she vocalizes her changed desires, loses her virginity to Shoda, and severs emotional ties to Akito.

Her arc concludes with profound psychological immersion into this new reality, leaving Akito powerless and traumatized by her transformation.