Character Relationship Map: Calla

Characters

• Sun-woo (played by Song Seung-heon) — protagonist

  Sun-woo is the central character, who receives anonymous calla lilies and becomes convinced that Ji-hee is sending them. After she is murdered at the hotel where he planned to confess his feelings, he...

• Ji-hee (played by Kim Hee-seon) — supporting

  Ji-hee is a woman Sun-woo meets on a bus and connects to the anonymous calla lilies because music from their attached note is playing at the flower shop where she works. He falls in love with her and...

• Su-jin (played by Kim Hyun-joo) — supporting

  Su-jin is Ji-hee's friend and the actual sender of the calla lilies that Sun-woo has been receiving. Sun-woo initially mistakes Ji-hee for his secret admirer, but after his attempt to change the past,...

• Min-wook (played by Choi Cheol-ho) — supporting

  A man involved in a police operation concerning a false meeting and money, whom Sun-woo encounters while trying to alter the events leading to the hostage crisis. During the crisis, Min-wook holds Ji-...

• Swimming Pool Counter (played by Hong So-yeong) — supporting

  A person at the swimming pool whom Sun-woo approaches for help while searching for Ji-hee after returning to the days before Christmas. The plot summary identifies the counter only in this brief encou...

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Sun-woo → Ji-hee (Romantic Love Interest Separated By Tragedy) — Their developing romance becomes the emotional center of the story, while Ji-hee's death drives Sun-woo to attempt to change the past.

  Sun-woo and Ji-hee gradually reveal their feelings, and Sun-woo tells her that he loves her before leaving on a work trip. Their planned hotel meeting...

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Sun-woo → Swimming Pool Counter (Alliance Information-Seeking Contact) — The Swimming Pool Counter is part of Sun-woo's effort to locate Ji-hee before the fatal crisis occurs again.

  After returning to the days before Christmas, Sun-woo searches for Ji-hee and asks people at the flower shop and swimming pool for help.

• Sun-woo → Min-wook (Conflict Rescuer Opposing Captor) — Their opposing goals define the final confrontation: Sun-woo attempts a rescue while Min-wook sustains the hostage crisis.

  Sun-woo rushes toward the sealed-off hostage scene and later struggles to reach Ji-hee while Min-wook holds her and threatens her life.

• Ji-hee → Min-wook (Conflict Hostage And Captor) — Min-wook's control over Ji-hee creates the immediate physical danger at the story's climax.

  During the returning hostage situation, Min-wook holds Ji-hee and threatens to kill her while Sun-woo pleads for her release.

• Ji-hee → Su-jin (Social Friend) — Their friendship links Su-jin to the central disappearance and explains her role in the anonymous flower mystery.

  The character information identifies Su-jin as Ji-hee's friend. Su-jin's involvement in the search for Ji-hee further shows that she is personally con...

• Sun-woo → Su-jin (Alliance Search Ally And Misidentified Admirer) — Su-jin supports Sun-woo's search while her hidden connection to the flowers creates a major misunderstanding.

  Su-jin becomes involved in the search for Ji-hee and helps Sun-woo try to find her. Sun-woo initially believes Ji-hee sent the anonymous calla lilies,...

Story Analysis

A doomed romance unfolds through anonymous flowers, a fatal hostage crisis, and a repeated attempt to alter the past.

Plot Progression

1. Flowers Before the Storm — Sun-woo receives anonymous calla lilies and tries to identify their sender. His connection with Ji-hee develops as the flower mystery draws them together.
2. A Promise at the Hotel — Sun-woo and Ji-hee acknowledge their feelings, and he tells her that he loves her. They plan to meet at a hotel lounge after his work trip.
3. The First Fatal Night — A hostage crisis destroys the planned reunion. Ji-hee is killed, leaving Sun-woo desperate to see her alive again.
4. Chasing the Lost Day — Sun-woo returns to the days before Christmas and searches for Ji-hee. He seeks help, encounters Min-wook during a police operation, and continues despite being injured.
5. The Cycle Closes — The hostage crisis repeats, with Sun-woo trying to reach Ji-hee while Min-wook threatens her. The reported deaths preserve the story's tragic cycle.