An Observation Journal Should Be Seen Through To The Very End.The episode is in the form of an observation diary from a student named Daigoro, who meets Hasegawa some time ago. Daigoro lets Hasegawa stay at his house and eventually mentions his father, who left him and his mother after losing his job and cheating on his wife. After arguing with his mother, Daigoro lets Hasegawa stay at their home where he starts a relationship with his mother. In a job interview, Hasegawa meets Daigoro's father who now wants to return with his family and is also applying for the same job. Hasegawa deliberately causes trouble at the workplace and gives up his employment to Daigoro's father. Daigoro berates Hasegawa for screwing up his chance at employment, all the while suspecting Hasegawa did something for his father. In the closing credits of the diary, all of the students and the teacher are moved to the point of tears by the story, but the teacher becomes surprised when he discovers the journal was written by Daigoro's mother.