At first glance, Umi-chan is a sunny, slender, and beautiful gal. However, once she starts talking, her voice is soft and reserved! The volleyball team captain, with a dream of becoming a nurse, she's not comfortable in the spotlight, contrary to her appearance. Moreover, she's extremely shy in matters of love. Despite her lack of experience, this innocent gal takes on the challenge of a mature level, bound and fixed with a vibrator, stepping several rungs at once! Unable to move, in a spread-eagle position, she plays the bound game, oblivious to onlookers, writhing her hips, unable to hide her pleasure. At the right moment, an electric massager strikes! Repeatedly reaching climax through teasing and stopping... Is masochistic arousal awakening!? After being toyed with, when shown the real thing, Umi-chan's sexual desire is evident as she eagerly welcomes it with her tongue out. For Umi-chan, who has awakened to deepthroating, it's just a reward. Barely containing her instincts, with her trojan pussy opened by herself, she begs as the real penis fills her sunken womb, 'More, more, please do me more...!' With her pale, beautiful breasts self-stimulated, she's relentlessly pounded until she loses herself, even as she reaches climax. Despite being exhausted, she firmly demands a second round, finishing with continuous internal ejaculation!