Fukaya Zensuke led an ordinary life as a teacher for many years and chose to become a probation officer for the second phase of his life. Eight months into this new role, he has been helping people who are about to complete their prison sentence and on parole, to turn over a new leaf and return to society. In fact, Zensuke had been looking for an opportunity to do what he had not finished during his time as a teacher by serving as a probation officer. He is put in charge of someone he has never encountered before and does not fit the mould when he is appointed to be the probation officer of Koyama Yuko.
