Elizabeth Williams states, "We meet our hero standing on the edge of a bridge, sans trousers. Some punk kids stole his pants and hung them high on the bridge. A mysterious young woman sees him and offers to help him get the pants. Of course, Ko can't be indebted to anyone, so he refuses help. He ends up falling in the river. The young woman rescues him, and Ko is overwhelmed with guilt. His entire existence is thanks to this girl. He tells her that he will do anything for her, for after all, he refuses to owe her anything. She asks him to experience love with her, and so begins Ko's adventure under the bridge."