Even in class, she's not noticeable and doesn't care about fashion. She has a gloomy and introverted personality, but one day, this mourning girl asks me to tutor her. When I go to her house for tutoring, she suggests watching an AV together. Turns out, she's a hardcore AV otaku! As we watch her recommended AV, the atmosphere gets weird, and I get a full erection when she looks at me with a lustful expression... Even without experience, she wants to try things out on me! This mourning girl with her hidden big tits and insatiable libido turned me into her personal sex toy!