Nobita becomes overjoyed after being praised by girls for his ability to catch peanuts in his mouth. However, he later discovers that they only praised him out of politeness, leaving him deeply disappointed. Feeling sorry for him, Doraemon brings a “Friend Robot” named Robo-ko from the future, programmed to love only Nobita. Robo-ko is not only cute but also constantly praises everything Nobita does, making him extremely happy. However, she gradually begins to become overly possessive of him, trying to keep him all to herself.