Ichijou Ririka had asked her mother to take care of her java sparrow, Luku-kun, while she was in London. After returning, she found out her mother had also secretly taken in her sister's lovebird (Mameruriha) and brought the two birds within 15cm of each other despite being told to keep them strictly apart. Enraged at being ignored, she exploded with "Kuso baba!", and as a result, Luku-kun ended up realizing he was a bird.
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