Thanks to Taiyo's diligent care as a new pet owner, Yuki goes from a stray on the streets to the luxurious life of an indoor kitty. Just as Taiyo helps Yuki grow, Yuki helps bring Taiyo closer to his best friend Tetsu. Taiyo even makes a new friend in Utako, an employee at the cat café. One day, Taiyo gets the chance to pay it forward and design a flyer promoting cat adoptions. But just as he grows comfortable with this new way of life, every cat owner's worst fear happens: Yuki disappears!