Costume Rape ~Seido Kaichou wa Ore Senzoku no Onapet Cosplayer~

Kuroro Karasuyama was your average gloomy kid in the anime club. At one event, he spotted Reiko Nishikiori, the student council president who always mocked him, dressed up in cosplay.
He snapped a photo. Turns out, Reiko was not just a closet otaku-she was a cosplayer too.
Kuroro used shots where Reiko's areola or pubes peeked out of her costume to blackmail her, calling her out for "private shoots" and raping her.
With more and more dirt piling up on her, Reiko had no choice but to do whatever Kuroro said, day after day getting violated in all kinds of cosplay outfits.
One day, as usual, he had Reiko dressed up and was abusing her in the anime clubroom when Midori Kirisawa, a younger club member, walked in on them.
But instead of keeping quiet, Kuroro raped Midori too, and took pictures for insurance.
With their secrets held over them and the abuse never stopping, both girls eventually started to feel pleasure from it all.
And so today again, a new costume gets soaked in white as another filthy photoshoot begins...

[Translated from dlsite]