Sang-doo tries to take care of his sick daughter while dealing with her irresponsible mother.

Sang-doo finds work at Eun-hwan's school as a bodyguard. We also learn more about Sang-doo's past.

Sang-doo is tormented by Eun-hwan's younger brother at school.

Sang-doo enrolls in Eun-hwan's school as a new student despite an awkward morning.

Eun-hwan's younger brother picks a fight with Sang-doo at school.

Sang-doo's popularity skyrockets at school and some jealous boys hatch a plot against him.