Surely Someday is a Japanese movie directed by actor Shun Oguri.
Drawing influence from the street musicians of Miyagi, high school students Takumi, Kyohei, Shuuto, Kazuo, and Yuuki form a band and spend all their free time practicing for their school’s upcoming festival.
However, when the festival is abruptly canceled, they come up a dimwitted strategy to fake a bomb threat to force the principal to change his mind. Surprisingly, their plan seems to work at first, but when a real bomb goes off, the group are forced to take responsibility for the explosion and are kicked out of school.
Three years later, further details of the incident are revealed as Takumi and company attempt to put their lives back in order.