<p>Seventeen-year-old Nanaka Kirisato is a high school student serious about her studies and goals in life. She frequently criticizes her best friend, Nenji Nagihara, for being a childish delinquent who spends his time fighting other boys. Then one day, a

<p>Teacher Hisoka wakes up to find that he has died and is now inhabiting the body of the student he tried to save. This is due to the interference of a monk, who informs him that he cannot tell anyone who he really is or the bond between him and his "ne