I was looking at this question and wanted to add the series tag for it. Unfortunately, there's no tag to the effect of the-irregular-at-magic-high-school. Since the title sounded reasonably familiar, I thought I'd search for
irregular magic in the site to check if some form of the Japanese title was being used instead, and it turns out mahouka-koukou is being used right now.
Might some tag with some form of the English title be added as a synonym? At least as someone who doesn't follow the series, this was a bit confusing, and fact that the post initially was only tagged with music doesn't seem to be a point in favour of the current state of things.
Of course, it's possible that this is a series where the Japanese title is either easy to remember (e.g. Gin no Saji) or used frequently enough on the internet (e.g. SnK) that this wouldn't matter to the asker: I wouldn't know since I don't follow the series.