In Season 2, Episode 5, Hazuki leaves the train with a salute towards Kumiko (Can view here). In some anime, they call this a "Blitzendegen". Based off of this forum, (link) this could just mean a way of saying goodbye or have no meaning at all. It's similar to waving at someone in other cultures

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.