The demon changes his personality and at first Maron thinks it has changed for the better , but then Yamato 's personality turns cold and mean .
A meek boy named Yamato Minazuki , one of Maron 's friends , has been possessed by a demon .
The demon changes Maron 's personality and at Maron Maron thinks it has changed for the better , but Yamato Minazuki Yamato 's personality turns cold and mean .
A meek boy named Yamato Minazuki , one of Maron 's friends , has been possessed by a demon .