Ayumi, a sweet and untouched Japanese coed, finds herself in a tutorial session with her boyfriend, M-kun, who's eager to introduce her to the pleasures of oral sex. She tentatively takes his enormous, veiny cock into her mouth, her eyes watering as she struggles to accommodate its size. M-kun guides her, encouraging her to use her tongue, her lips, her hands, until she's bobbing enthusiastically, her spit dripping down his shaft. He warns her of his impending orgasm, and Ayumi, her cheeks flushed, eagerly takes him into her mouth, swallowing every bit of his hot, creamy load, her innocent face a picture of post-blown-mind bliss.