A short stop-motion anime celebrating the San-X character's 15th anniversary. The character's story begins when the titular Rilakkuma suddenly appears in the apartment of office worker Kaoru and begins living there, spending every day idling around. He has a zipper on his back, but the contents remain unknown. He likes food like pancakes, omelette rice, pudding, and dango. He lives together with the little white cub Korilakkuma and Kaoru's pet Kiiroitori ("yellow bird").