Invited by her senior teacher under the pretense of a "meeting," two teachers head to a love hotel. A thin thong digs deep into her crotch, her glowing hips standing out vividly in the dark. Koharu, after being spanked on the buttocks, acts like a complete female masochist, gratefully saying, "I'm so happy to be hit as much as you please." In missionary cowgirl position, she repeatedly cries out "I'm cumming! I'm cumming!" while vigorously thrusting her hips, her beautiful ass being spanked. Her sensitive body sways like waves, writhing and moaning in pursuit of pleasure, climaxing with intense, convulsive tremors. The story unfolds their escalating passion through raw, unprotected sex.