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High school freshman Mi-So is enthralled when she sees her classmate Hyo-Jeong playing a retro handheld video game on the train. Hyo-Jeong’s always seemed kind of intimidating, but the way her eyes sparkle as she plays makes Mi-So want to learn more about retro games, and muster up the courage to befriend her. When Mi-So and her older brother Min-Jun head to the old video game store in their town, not only do they find that it's run by Hyo-Jeong and her older sister, they also discover a nostalgic portal to the past… (Source: WEBTOONS, edited)