Master Shinkome asks Shinden to find a former disciple, Shintoto, from his rakugoka (comic storytelling) family. Shinden visits ex-disciples in his search for Shintoto.
The story alternates between the past and present, linked by a fateful song. During World War II, Japanese submarine I-77 battles an American destroyer off the coast of Okinawa. Before heading to war, the captain received a final present from his lover, the score to a song titled Manatsu no Orion. Sixty-four years later, his granddaughter discovers the score and the significance behind the song.
Sawatari Goro now works at Akado High School as a vice principal. Although the head director of the school board speficically orders him to handle the problematic class 3-D, the students are just too much for him. So Sawatari goes far away to a southern island to search for Yankumi, and convince her to work for Akado. Yankumi accepts the offer, only to find that her class (again) is full of punks, where two rival groups of students are always at each other's throats. Will Yankumi's strong belief in students and teaching work this time?