Lee Hyukjae; a popular, well mannered 2nd year student, liked by all his teachers, studying at The Seoul Dance Academy.

Then there's Lee Donghae; to put it simply, a rebel. Also in his 2nd year, he skips school constantly and has his own gangster group called ''The Primes'.

The only thing these two teenagers have in common is, really, their last name.

So what will happen when Hyukjae is assigned to tutor a student with low grades?