Machiko is first seen running into Gengo Kotaka on her way out of an office building in downtown Tokyo with a tape recording she pilfered from the World Children's Land committee on the fifth floor. She drops the tape, and it is picked up by Kotaka. After he exits the building, she and her colleague Shosaku Takasugi try to get the tape back from him, and they recruit him to their cause. Machiko's brother Takashi worked for World Children's World and went missing. Machiko later read his diary and saw that he had written that the corporation was up to something diabolical. Kotaka returns the next day after work with her brother's cigarette lighter which she recognizes by his initials engraved on it. The day after, Kotaka returns with some free cigarettes given to him by his employers at Children's Land, but they show up at their base of operations (which may be Machiko's home), and take back the tape recording. They eventually sneak into Children's Land to rescue Takashi, and she sends up a weather balloon with a zip-line attached to it, and when she receives a signal from Kotaka on the tenth floor, she floats it up to him so that he may safley come down with her brother and their colleague Tomoko Tomoe.