A pure and innocent female college student named Mayu, who works part-time at a beef bowl restaurant—a rare find these days. While she keeps her pubic hair neatly trimmed, her armpit hair is surprisingly thick and bushy, something she shyly admits with a "So embarrassing!" But there's an unexpected reason behind her underarm hair. Cheerful and naturally horny, Mayu has a surprisingly soft physique, and she's deeply into armpit fetish play—especially armpit handjob and armpit ejaculation scenes. She loves indulging in messy, juice-filled extra-large servings of erotic fun.