The Best Episodes Written By Yoon Ji Ryun

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 factory intern’s fatal injury brings Han Jeong-u and Han Geu-ru to his room, where his goals for the future and love for his parents come into view.

Cho Sang-gu moves in as Geu-ru's legal guardian and new colleague. Geu-ru searches for a mother's message in her stash of cash and bank receipts.

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

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

Sang-gu and Geu-ru 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.

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

Just being rich isn't enough to survive the teen tyranny at Shinhwa – outsiders or loners are often marked as targets by the bored über-clique F4.

Jun-pyo asks Yumi to make the lunchbox again, proving that Yumi had taken credit for the lunch that Jan-di had made for him.

Sang-gu begrudgingly took Kim Su-cheol under his wing 10 years ago, unaware that his mentorship would bloom into brotherhood and end in destruction.

Not yet ready to let Jeong-u go, Geu-ru runs away from home. As their cohabitation comes to an end, Sang-gu's qualification as a guardian is determined.

A scandalous rumor is spread on the Internet that a second-year student at Shinhwa High School, identified as "Miss K," is pregnant.

Not keen to watch Jan-di dancing with one of his best friends, Jun-pyo leaves the ballroom and ends up taking out his frustrations by the poolside.

Making a sudden decision, Jan-di tells her mother she has to go somewhere and runs off, heading toward Namsan Tower.

Jan-di's bike is set on fire while she is assaulted with water balloons and blasted with a fire extinguisher.

A psychic predicts that Jan-di will be losing something important.

Jun-pyo plans to evict his best friend and Jan-di out of Shinhwa High School – and out of F4.

Jan-di rushes to the hospital after hearing that Jun-pyo has been in an accident.

Yi-jung receives a hysterical call from his mother threatening to commit suicide because of his father.

Valentine's Day reveals hidden feelings. With the family dry cleaning business in serious trouble, Jan-di decides to take a new job.

Jan-di's father gets taken away by loan sharks, which inevitably forces Jan-di's mother to swallow her pride and beg Madam Kang for help.

Woo-bin tries to talk some sense into Yi-jung, who is hell bent on drinking himself into oblivion.

Feeling it's time to reveal the truth, Mr. Jung leads Jun-hee to the mystery patient's bedside, and at the sight of her father, Jun-hee breaks down.

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

A note indicates that class has been moved to the science lab. The lab is empty, but Jan-di waits, not noticing that the room is filling with fumes.