Chika, a theater troupe member, is chosen as the lead for the upcoming performance, eager to meet the director's expectations. However, the play includes a rape scene. Having never experienced rape before, Chika struggles to understand the victim's emotions and psychological trauma, leading her into days of masturbation and rehearsal where she constantly imagines the act. Gradually, the rapist from her fantasies begins to manifest in reality, blurring the line between imagination and truth. Lured into forbidden territory, Chika embodies the raped heroine, her slender body writhing in torment as a monstrous, thick cock pries open her vaginal entrance. Tormented by the messenger of lust, her body expresses both terror and pleasure.