Hohosangbak summary:

Ji-hwan Kang, who was forced to transfer schools after getting involved in a gang fight, decides to ask Yu-seong Han, the top student in the class, for help with his studies. However, he accidentally tears Yu-seong's school uniform. But what's that on Yu-seong's back? A tiger tattoo on this supposedly model student?! Ji-hwan proposes to keep Yu-seong's tattoo and identity a secret in exchange for tutoring. In response, Yu-seong deliberately begins to engage in close physical contact, hoping to make Ji-hwan give up on his own...