• Mild
  • Might be slightly explicit stuff in the opening song.
  • A few shirtless males.
  • There is a ball in Episode 11 and some of the attires there might be somewhat revealing.
  • One bath scene though not very explicit.
  • Considerable number of romantic scenes.
  • A kiss but nothing is displayed. (It is covered entirely by the characters head)
  • In order for Yuki to prevent Zero from losing control, she has to allow him to suck her blood. When these times occur, Zero (partly influenced by his level-E blood) may pin her to the wall, Yuki is seen visibly blushing. This is slightly suggestive in nature, but this stops in season 2.
  • Quite a few female characters with revealing clothes especially in later episodes. A vampire who just awoken sucks their blood in a romantic way and reduces them to dust.