الحلقة 1: يستقبل هاروما فتاة تدعي أنها أخته ويسميها تشوكو.

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College student Haruma is stunned when a girl stated to be his sister is delivered to his apartment. Unwilling to evict her, he names the girl Choco, because she is constantly referring to her guide book (chocotto being Japanese for 'manual'). Haruma takes Choco to the mall to buy her clothing, but they lose sight of each other inside. (Source: Wikipedia)