Anyone know the manga where the setting is some sort of an orphanage or a boarding school with lots of snow? It's a series of some sort where the chapters are divided focusing on the various students of the said school. It has a very coming of age tone into it. I remember a part wherein the main story started with the two girls where one left, and the other stayed (eventually becoming a teacher if my memory serves me correctly). I remember a chapter that features a pair wherein one of the girls broke a vase which caused blood to drip from her. But in reality unbeknownst to everyone else it was just actually her experiencing her very first period. The girl had white/blonde short hair.