The sleepy baby boy with the Anime eyes is monitoring the sleep pattern of its owner. Yumel likes to sleep and is supposedly acting up if the owner's sleep pattern is not right. Whatever right means. So I imagine, you come home late one night after having one or two beers. In the morning Yumel is talking trash because you came home late.
In any case if you are into this "very Japanese" toy, Audiocubes has you covered. They export the Yumel Doll for $149.00.There are even target="_blank">clothes to buy for Yumel, so he can get out of his pyjamas once in a while.