Kamuro Aya, Miyaji Mahoro, Hinakura Riko, and Yomine Miharu all chase a balloon only to end up in their lesson room. Suddenly seeing the four gathered like that, CEO Masaki smiles a smile full of meaning and says that "It's all inevitable." Meanwhile, Aya is taking care of a weakened little cat. Judging from its surgery wounds, Mahoro deduces that it's not a stray cat, but a lost pet. Thus begins the search for its owner, but having grown attached to the cat, Aya can't quite put her heart into the search.