Before, magic filled up the world, and then magic suddenly disappeared, from everywhere. Magicians can't perform magic anymore, so now these formerly powerful, now talentless ones are looked down upon by war...

"There once was a girl with a splendid flower blooming upon her chest." When Lys was born, her heart did not beat at all. To save her, her mother made a contract with a devil: Lys can borrow his heart until...

Accompanied by a talking lantern, Mika pursues her sister on a quest to retrieve that which was stolen from her long ago.