November 10, 1969
Appeared serially in "Play Manga" (Akita Shoten Publishing Co., Ltd.) as a complete story

Tsukima is employed at a company called Morioka Chemicals. He is a man quick to adapt to changing circumstances, like a chameleon. One day, a woman asks him to act as a corporate spy because he is trusted by the company executives. He steals a company's confidential document, which shows a chemical equation for improving animal intelligence. Tsukima travels to a small isolated island to hand the document to the woman, and there he discovers her real identity.