Not yet ready to let Jung Woo go, Geu Roo runs away from home. As their cohabitation comes to an end, Sang Goo's qualification as a guardian is determined.

Matthew Green's search for his birth mother ends with a heartbreaking misunderstanding. Sang Goo sets out to enter his final fight.

Sang Goo is coerced into signing up for a fight in exchange for Geu Roo and the house deed. On a special day, Geu Roo leads Sang Goo down memory lane.

Sang Goo begrudgingly took Kim Soo Chul under his wing 10 years ago, unaware that his mentorship would bloom into brotherhood and end in destruction.

Sang Goo and Geu Roo try to give a proper sendoff to a doting couple who called Move to Heaven after deciding to leave the world together hand in hand.

The trauma cleaners search for the loved one of a slain doctor to hand-deliver a box full of regrets, hopes and an unrealized future for two.

A user manual for a device unseen at the crime scene keeps Geu Roo up at night. Sang Goo must make a loan payment by putting up either cash or his fists.

A suit store owner reveals a mother's longstanding wish. Sang Goo is reminded of his costly promise. The trauma cleaners arrive at a bloody crime scene.

Jo Sang Goo moves in as Geu Roo's legal guardian and new colleague. Geu Roo searches for a mother's message in her stash of cash and bank receipts.

A factory intern's fatal injury brings Han Jung Woo and Han Geu Roo to his room, where his goals for the future and love for his parents come into view.