My slender, petite, big-breasted girlfriend was seduced and impregnated by my father.

Alice is the daughter of the president of an apparel company and a rising star. Her colleague, Takashi, is dating her, and the two were planning to get married in the future. One day, they learn that the apparel company they work for is on the verge of bankruptcy. They go to Takashi's father, Toru, an investor, to ask for a loan, and somehow manage to get one to cover the payments. The condition is that Takashi and Alice get married. The company is saved by their marriage, but Toru desires Alice as a woman. Alice is drugged with an aphrodisiac and raped by her stepfather. Through repeated cunnilingus, close missionary position sex, and passionate sex, her heart gradually turns towards her stepfather, and she allows him to impregnate her.