Aki experiences her first time being molested on a train. Defenseless, her body is touched, she's jerked off repeatedly, and finally gets semen squirted on her buttocks. A man who witnessed it all lures her into a public restroom, tells her he can tell she's sexually frustrated, and forces her into sex while she's still in that state. Confused by the sudden turn of events, Aki has no choice but to submit to his advances. A tense, thrilling encounter unfolds.