en CB01 OFFICIAL. In a not so distant future, household Androids can be acquired to live together with certain people to rehabilitate them into society. Unit C.A.T 2538 (Also known as CAT) lives together with Will, a recovering alcoholic and addict, a self-proclaimed "trash of society." Tensions rise high as the line between goals, emotions, and who is actually trying to become a better version of themselves blurs to a thin, dangerous line.