Cosplay Change: Pure-kei Joshidaisei no Kiken na Seiheki – Episode 4 (ES)

Aima Imoko, the sheltered yet curvaceous college girl (165cm, 89-52-86) obsessed with anime cosplay, spots a skimpy big-breasted warrior costume outside the shady store. Unable to resist, she tries it on, triggering her "Cosplay Change" power. Reality syncs with the anime realm, thrusting her and the perverted crossdressing store manager into a convenience store where she becomes the bold "Sailor Mufu-n" – a magical warrior who declares in thick Kansai dialect: "Any trouble, I'll handle it for ya! Big-Breasted Warrior Sailor Mufu-n arrives, yaa!"

Dressed in an outfit that barely contains her massive assets, she takes a part-time job at ¥800/hour, turning routine tasks into erotic spectacles. The manager exploits the situation with abnormal, maniacal attacks: forcing her to make onigiri with sweat-drenched, musky armpits for "special salty flavor" that supposedly boosts virility, leading to intense teasing, armpit worship, money-based domination play, and relentless sexual assaults amid flying white fluids across the store counters.

Aima's innocent demeanor clashes wildly with the vulgar, fetish-driven fantasy as she questions the absurdity while succumbing to overwhelming pleasure. This final episode ties up her dual life—pure ojou-sama versus hyper-sexual cosplayer—with peak hentai chaos, bizarre everyday perversions, and a satisfyingly lewd conclusion to the series.