The main female's robe falls off in front of her brother and she is shown in her bra and underwear.

Several times characters are shown nude or partially nude, but never with anatomic detail.

It is implied several times throughout the series that the main protagonists, who are siblings, are in a romantic relationship.

The series starts out set in an innocent high school setting, but as it progresses there are several very bloody scenes including limb severing, bodies exploding from within, and severe blood spatters.

Episode 1 - war style shooting of magical energy. No blood.

Several "standard" rough language uses including GD, but no F bombs.

Several scenes in which minor drinking or brief smoking are portrayed.

As the series progresses there are many deadly attacks against both main characters and aggressors, quite a few in no-holds-barred bloody battles.