Genius inventor Null tragically loses her older sister Peta in an accident. To get over the grief, Null develops "Peta Robo," a robot with the same characteristics as her late sister. However, the robot is a little different as to what Null expected.
(Source: MAL News)
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"#NULL!*Peta" by Null (Azuki Waki), Peta (Reina Ueda)