In this alternate world of My Hero Academia, Izuku Midoriya finds himself transported to a society where only females exist. Initially disoriented, he soon discovers that he is the sole male in this world, wearing his hero costume. As he explores the city, he realizes that everything is different from his original world, yet some aspects remain similar. The rules and quirks of this world are distinct, but heroes and villains still exist.
The female population in this world is characterized by their voluptuous, curvaceous, curvy, busty, sexy, bombshell, or hourglass figures. Each female has unique physical attributes, including varying breast sizes, with some having humongous or significantly larger breasts than others. Their breasts are heavy and defy gravity, with larger areolas and nipples. They also have small, slender waists and wider child-bearing hips, gigantic bubble butts, and thick thighs with long muscular legs. The females' heights vary, with some being taller or shorter than others, possibly due to their quirks. Despite their differences in height and physical attributes, they all share a common trait: they appear ageless, with no signs of sagging flesh, aging, or wrinkles on their bodies. They seem to be unbothered by clothing malfunctions and often wear skimpy and erotic outfits in public that barely hide their private parts.
Izuku learns that underwear does not exist in this world and that the females decorate their bodies with jewelry, tattoos, piercings, chokers, and other lewd items. Society is focused on pleasing others through sex-eroticism, which raises questions about how Izuku will adapt to this new environment. Izuku meets a female version of himself named Izumi Midoriya, who brings him to U.A. to meet the principal Nedzumi (the female version of Nedzu). He discovers that he is the first male to exist in this world where males were previously considered mere legends or myths. As Izuku navigates this new life alone in a world filled with femininity, will he be able to survive? Can Izuku handle being surrounded by so many women who crave sex? Will his relationships evolve into something more as time goes on?