Yeah, there's Sakamoto who is just like... amazing. There's Sakamoto's friend who seems like he'd be a shallow character just to be a nerd and comedy relief but also ends up being a great guy. There's also some "bad dudes" and a whole (comedic) subplot with them involving school gangs.

Most of the screen time is on Sakamoto and secondarily his friend but that's fine because Sakamoto himself is an amazing character.