Character Relationship Map: Nothing Serious

Characters

• Woo-ri (played by Son Suk-ku) — protagonist

  A 33-year-old man who meets Ja-young through a dating app, initially presenting the encounter as simple physical attraction. Their one-night meeting develops into an emotionally ambiguous relationship...

• Ja-young (played by Jeon Jong-seo) — supporting

  A 29-year-old woman who dislikes conventional dating but speaks openly about sex and loneliness. Still hurt by Namkoong Sang-woo, she meets Woo-ri through a dating app and becomes increasingly attache...

• Editor-in-Chief (played by Kim Jae-hwa) — supporting

  The editor-in-chief at the magazine where Woo-ri works. This character encourages him to create a sex column that feels like an intimate conversation with readers and instructs him to interview someon...

• Namkoong Sang-woo (played by Park Jong-hwan) — minor

  Ja-young’s first love and a central source of her unresolved pain. He was with her for two years and remained physically close to her afterward, but ultimately chose another woman and prepared to marr...

Canonical Relationships

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

• Editor-in-Chief → Woo-ri (Professional Supervisor) — The Editor-in-Chief assigns and shapes Woo-ri's central professional project.

  At the magazine, the Editor-in-Chief encourages Woo-ri to create a sex column and directs him to interview someone with compelling personal experience...

• Ja-young → Namkoong Sang-woo (Romantic Former Lover) — He remains the unresolved first love shaping Ja-young's choices.

  Ja-young and Namkoong Sang-woo were together for two years and remained physically close for years afterward.

• Woo-ri → Ja-young (Romantic Interest) — Their physical relationship gradually becomes emotionally complicated.

  Woo-ri meets Ja-young through a dating app, and their planned one-night encounter develops into repeated sex, conversations, and emotional attachment.

Story Dynamics

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

• Woo-ri → Namkoong Sang-woo (Narrative Indirect Rival) — Namkoong Sang-woo functions as an indirect force within Woo-ri and Ja-young's conflict.

  Ja-young's unresolved pain over Namkoong Sang-woo affects her relationship with Woo-ri, especially around the event connected to his wedding.

Story Analysis

A casual relationship becomes a painful examination of loneliness, unresolved love, hidden motives, and the ethics of turning intimacy into public material.

Plot Progression

1. A Column Looking For Truth — Woo-ri moves through a dull routine until the Editor-in-Chief assigns him an intimate sex column. He is instructed to find a real person whose experiences can carry the story.
2. Old Love, New Wager — Ja-young's unresolved attachment to Namkoong Sang-woo resurfaces when she hears about his upcoming marriage. She responds with a wager and enters a dating app in search of a temporary partner.
3. A Casual Arrangement Deepens — Woo-ri and Ja-young begin with a supposedly physical encounter, but continue meeting and sharing vulnerable conversations. Their insistence that the relationship has no future increasingly conflicts w...
4. Intimacy Becomes Material — Woo-ri transforms the relationship into a popular column while withholding the full purpose of his approach. Ja-young becomes emotionally dependent on his contact as her old abandonment fears return.
5. The Cost Of Being Written — After the wedding-linked event, Ja-young discovers the column and confronts Woo-ri. His apology cannot repair the concealed motive, leaving their relationship at a painful impasse.