An uncle researcher developing drugs to induce estrus in endangered animals. His niece sumire, who came to Tokyo for university entrance exams, accidentally gets splashed with a powerful aphrodisiac meant for African elephants and mountain gorillas while visiting her uncle's lab. "Uncle, I'm so hot! My body is on fire!" "I need to fuck right now!" The niece, tripping on heat, comes at him like a wild beast, demanding his cock.