Chihiro, who loves mythology, goes to the laboratory of Professor Tsukishima, whom he admires. There, he meets a mysterious professor and three beautiful women. At Tsukishima's urging, Chihiro draws a picture of a certain creature. This is the true form of the monster "INner" (the thing inside) that lurks inside people. She is told by Tsukishima that his memory made him draw it... The monster appears in front of Chihiro, who can't hide her confusion!?