Love and sex

Story in a world full of people with supernatural abilities. FL is not one of them, but she has dispositions to be their partner (because of attractivity and ability to produce strong kids). She's a zero, the best 'vessel' that attracts those with the strongest abilities.

Well, apart from the whole concept being problematic from feministic point of view (well, maaany mangas are), it contains some interesting and clever thoughts and concepts. That's what I like about it.