Ui Tennyo no Kemonomichi

The celestial sisters, Nanori and Yuori, have come to a secluded hot spring deep in the mountains for a therapeutic soak. A sinister monkey monster dwells in the hot spring. As Nanori and Yuori shed their “Celestial Robes”—the source of their power—and expose their defenseless, naked bodies, the beast's lust, starved for a mate, pounces upon them.