The action takes place in our time (supposedly). People who have the ability to control beetles (Mushi), called Host`ami. The problem is that these bugs sometimes get out of control and begin to kill people right and left.Besides return ability, the beetles feed on dreams Host`ov. And there comes a time when the beetles are completely devour all the dreams and Host dies. If you kill Mushi, the Host will survive, but will Fallen (something psycho -type). And chapters. hero comes into the squad that using beetles forces trying to find three major beetle and put an end to all Mushi.However, there is an opposition that does not want to be destroyed. Heads. Heroine is a superhit, who returned from Fallen. As it turned out, she was sent to the Fallen chapters. hero, a certain number of years ago. Then when chapters. Hero was transferred to the school, they met again. He recognized her - she did not.In the same school learning The leader of the opposition, who made??friends with chapters. heroine and secretly in love with chapters. the hero, not knowing that he is her sworn enemy - because all fighting masked. ranobe Mushi-Uta from Iwai Kyouhei.