Setsuna has a bit of a problem that most teenagers do not have: He is in love with his sister. However, things only get worse when he and his sister begin to be attacked by things calling themselves Angels, who claim to be after him because apparently he is a reincarnation of one of the most powerful angels ever. Together, he and his sister get pulled into a war between heaven and hell.

Because the anime is only and OVA with three episodee while the manga has 20 volumes it is hard to fit the whole story in the anime. So the OVA only covers the first arc of the manga which goes until the middle of the fourth volume. And also this part was strongly cut to tell the story in only 90 minutes. It’s a pity that this manga wasn’t made into an anime because it’s my most favourite manga but considering the story it becomes rather clear why it wasn’t made into a whole anime series. Also two characters are completely missing from the anime who played a major role in the first story arc. It is also important that you should read the manga first befor you watch the anime because then you will understand the story better.