Mayu is a girl in junior high school who has a hot-temper and refuses to go to school. Her one and only friend she could trust in life, a ferret named Myū, dies around when she meets K�hei and the other main characters. As soon as something bad happens, she starts yelling the ferret's name and crying uncontrollably. In order to help her grow up, K�hei gets her mixed in with his class. Her favorite food is a teriyaki burger. She also likes things that are long like a ferret, and takes a fancy to Rumi's hair and even strange plush snakes. From Wikipedia.