So close in terms of ideas you'd almost think that one inspired the other. Basically a highschooler and a gangster switch bodies and the highschooler with the soul of the gangster then becomes the new cool kid cause of his gangster-powers of beating people up.
Although Boyhood does not involve a body swap, the development of the bullied characters are similar. Both learn how to fight and stand against their bullies. Both include comedic elements but 'Boyhood' has it more than 'High School Return of a Gangster.' If you're looking for one that is set at an earlier time, I highly recommend 'Boyhood'-- SO UNDERRATED! Give it a try!!!