Mei-Shun met her home dental hygienist Ms. F yesterday. The former patient had a slight question: her upper canine teeth seem a bit brownish these days. After checking, the latter lady asked if she likes yellow food or drink. On the other paw of fluffy Mikan-chan, she used to enjoy flavored tea on weekdays decades before. That caused stain on her lower incisors – oh, green tea also gives 茶渋=cha-shibu!