Combat Robot Arpo was originally created to destroy humankind then something unimaginable happened to him while he was sleeping! When Arpo gets up, he finds himself in the middle of a strange family. A walking-encyclopedia Mom recreated Arpo: removing his weapon, reducing his power down to a house appliance, then inserting an emotion chip! A cold-blooded Arpo now turned into a mushy robot who is constantly picked on by twin sisters. After endless embarrassment, Arpo decided to escape from his misery. However, a housekeeping robot who loves Arpo gets in the way every time! Could Arpo finally find his way out?