Lumen Lunae - Wallpaper and Scan Gallery

We live in a world which is ruled by demons, and humans are just kept as pets. Kai and Aika go to school together, but everyone gets around Aika because she got pregnant from a rape. The kid was brought to the demons world. Aika doesn't know that Kai is this kid, wherelse Kai knows that Aika is his mother. He also knows that demons are after her and want to kill her, which he, of course, wants to avoid...... if only there wasn't his weak heart....