Whether long hair is allowed in Korean schools depends on the specific school's regulations.
While boys in Korea are now generally allowed to grow their hair longer than in previous decades, where shaving their heads was mandatory, the rules vary from school to school. Some more conservative schools might still enforce stricter hairstyle rules. According to "The School will Decide which Hairstyle to do," this rule depends on which school you go to; some conservative schools still follow the traditional way of hairstyle. So, it's best to check the individual school's policy.
