Inner Child.

Joo-ho, who lives near a military residence, uses his best friend Jae-beom to escape the bullying of his lieutenant commander's son, Il-taek. Then, Joo-ho left Jae-beom to suffer under Il-taek. However, shortly thereafter, Joo-ho is harassed by Il-taek again. With the help of his friend Damian, Joo-ho plans revenge against Il-taek, but he fails all the same. Meanwhile, Jae-beom becomes Il-taek's friend, and Joo-ho faces his hypocritical inner self.