[Machino Henmaru] Yumiko-chan, The Perverted Girl [RookieDreamsScanlation]

Caught in a sudden downpour, a naive girl named Yumiko finds herself seeking shelter from the rain. However, her unexpected encounter with a rowdy horse leads to a series of intense, frenzied moments that push her physical limits. As the unexpected penetration begins, the tension rises with every powerful thrust, transforming a simple rainy day into a series of overwhelming, high-impact sensations that leave her breathless and thoroughly filled.