The series follows the escalating sexual depravity of Hina Takigawa, a girl who appears to be the perfect student at an elite all-girls academy, and her unsuspecting boyfriend. Initially, he believes he's dating a pure, innocent maiden, but he soon discovers her secret, intensely perverted side. The arc of the series is a deep dive into Hina's exhibitionist fantasies. It begins with her boyfriend secretly watching her masturbate and pee in a secluded park, a fetish she indulges for the adrenaline rush of almost being caught. This discovery, instead of scaring him away, ignites a shared passion for public and risky sexual encounters. Their relationship transforms as they move from her solo acts to increasingly daring exploits together. Later episodes see them fucking doggystyle in a public restroom stall, the thrill heightened by the sounds of people outside. Hina's hunger for degradation and exposure grows, leading to a climactic scene where she gives her boyfriend a wet, sloppy blowjob in a crowded library, swallowing his entire load while trying to remain silent. The series culminates in them having raw, passionate sex in an unlocked classroom after hours, with Hina loudly screaming his name as he cums deep inside her, fully embracing her identity as his personal hentai girlfriend.