Shakuen no Eris - Season 1

Eris Violet of the Flames, a petite yet formidable hero, wields a fiery sword and is renowned as the land's strongest. After a misadventure leads to her capture by monsters, she is taken to their research facility. There, they cover her with their semen in an effort to break her will. Though she eventually escapes, her body has been left in a heightened, persistent state of sensitivity. The uncontrollable throbbing begins to interfere with her heroic duties. To manage the condition, she requests an extended vacation from her superior, Kiryuu. He grants her leave, but only under the condition that she serves as his personal receptacle for oral gratification.