Kafuka Fūra is cheerily walking to school one April morning when she suddenly spots a man trying to hang himself in a fit of despair. Kafuka manages to use her weight to snap the rope, thus saving his life. Kafuka has an eternally positive outlook on life, while the man, named Nozomu Itoshiki, has an eternally negative outlook on life. As the two converse, Kafuka gives Nozomu the nickname Pink Supervisor, and proceeds to pay him fifty yen to call him by this name. Nozomu eventually cannot take anymore of the girl's ridiculous ramblings, and runs off to school to start homeroom at the start of a new school year. When Nozomu walks in the door, he finds Kafuka is one of his students.