Trump: Another Space Continuum

The story takes place in a world where using magical powers is natural. Hiasen, the son of the most wanted criminal in this world, gets involved in the mysterious events of the so called "Melly Day". Trying to help Melly's ghost to find a certain person, he joins the Yeohadan, the police of the Trump-world.
But who is the person Melly is looking for? How did his father became a criminal? And what actually happened on the day his mother died?