[X] In a dojo in the eastern part of town. When there was no school, he had a whole lot more time in his day, and he could really buckle down and train. For some reason a local priest taught kung fu there on occassion, and he was alarmingly good to learn from. Thoroughly unpleasant to deal with, but the path of a Valkyrie is fraught with peril or something. One of these days he wouldn't be used as a floor mop by that new kouhai of his...
[X] At a cram school. His training also included the academic, it wasn't his strongest suit but he needed the best scores humanly possible to stand any kind of chance on St Freya's entrance exams. Also his crush attended the cram school, not that she ever looked in his direction.
[X] At home, where one normally opens letters. Not alone at home, he has some kind of weird dysfunctional freeloading family (plus a useful person), but at home.