Rio and the Summoned Demon

Rio invokes the whore “B” as a joke spell with her friends. She compares him to her ex-boyfriend, Iida, which may have irked Rio, but she tries to get him to admit that she is the better sex partner. Rio's response was, “Hey, that's enough, okay? Are you sorry?” Rio's body is being taught to enjoy the pleasures of sex, despite her feelings of rebellion against B's words and actions....

(Source: dlsite, translated)