Birthday Surprise! Saku's boss's niece, Yume-chan, is having a birthday bash and Saku and Yukichi are invited! They can't exactly parade a giant, bipedal cat out in public, but they also don't want to disappoint Yume-chan. How will they get themselves out of this pickle?! There's never a shortage of chaos and confusion in the Fukuzawa household, but at the end of the day, this messy office worker and skillful cat make it work!