September 17, 1969
Appeared in "Form Shonen Champion" (Akita Shoten Publishing Co., Ltd.) as a series of complete stories

The protagonist of this episode, narrating the story in the first person, and Sakai Kazuo are both car racers sharing a room. The protagonist has a human-sized doll named Yukari as his mascot. He drives with the doll beside him even in races because he is in love with her. But Sakai does not like this habit of his friend. One day, after a race in Fuji City, the two of them decide to have a talk about it by an air hole of Mt. Fuji. While they are quarreling, Yukari falls into the depths of the air hole. After they wander about for a while in the air hole without seeing the exit of the cave, Sakai finally finds it, and they escape to safety. The protagonist feels grateful for having a reliable friend, but he realizes at the next moment that it is not Sakai but someone else who has been with him all the time...