Takumi-chan's so cuteCute! Cute!Cute! Cute!Takumi-chan!Takumi-chan's so cuteTakumi-sensei is so cute!Takumi-senseiTakumin's so cute! Takumin!Barun barun shiyoru! Based on the Nico wiki article here, this is a saying normally associated with Shijou Takane's breasts. It's a derivative of "burun burun shiyoru" (ぶるんぶるんしよる). According to the Nico wiki here, "burun burun shiyoru" was a phrase that was originally used by the uploader of the Hagiwara Yukiho video here.