Character Relationship Map: The Heart Killers

Characters

• Kant (played by Kanaphan Puitrakul) — protagonist

  Kant is a tattooist who secretly works as a police spy. Assigned to investigate the gunman brothers Bison and Fadel, he tries to charm Bison into revealing information because of their unforgettable o...

• Bison (played by Thanawat Ratanakitpaisan) — protagonist

  Bison is one of two gunman brothers who own and operate a hamburger shop with Fadel. He is Kant’s target during the investigation, but their task becomes complicated because Bison was Kant’s one-night...

• Fadel (played by Archen Aydin) — supporting

  Fadel is Bison’s scary and protective older brother, and one of the gunmen running their hamburger shop. His guarded behavior thwarts Kant’s attempts to get information through Bison. Fadel also has a...

• Style (played by Natachai Boonprasert) — supporting

  Style is Kant’s handsome best friend and a mechanic who is described as fearless, irritating, and difficult to restrain. After previously rear-ending and fighting with Fadel, he agrees to help Kant ge...

Canonical Relationships

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

• Bison → Fadel (Brothers) — Brothers and professional partners whose deep familial bond is tested by external threats and police infiltration, ultimately strengthened by shared hardship.

  "Identified as hitman brothers who share targets, face threats together, confront their boss, and serve prison time together."

• Kant → Bison (Lovers) — A complex romance born from police surveillance that evolves into genuine love, tested by betrayal and resolved through mutual sacrifice.

  "Kant is ordered to observe Bison but falls for him; they become a couple, but Kant's deception causes fury and confrontation before they reconcile th...

• Style → Fadel (Lovers) — A relationship that starts as a strategic pursuit but matures into authentic affection and commitment.

  "Style is enlisted to win over Fadel, follows him, achieves a breakthrough at the gym, and they eventually date, reunite, and maintain their connectio...

• Kant → Fadel (Investigator and Target) — An initial professional surveillance relationship that becomes complicated by Style's involvement and the overarching mission's moral dilemmas.

  "Kant is ordered to observe and collect intel on Fadel, enlisting Style to approach him, but the dynamic shifts as the mission complicates."

Story Dynamics

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

• Kant → Style (Best Friends) — Close friends and investigative partners who support each other through the emotional and professional challenges of their undercover mission.

  "Kant enlists his best friend Style to help win over Fadel; they work together on the mission and navigate falling for their respective targets."

Story Analysis

A comprehensive breakdown of the undercover investigation, romantic entanglements, and criminal consequences across the single season.

Plot Progression

1. Season 1: Surveillance and Pursuit — Captain Christ assigns Kant to investigate hitman brothers Bison and Fadel. Kant enlists his best friend Style to help win over Fadel, while Kant focuses on Bison. The early episodes establish the und...
2. Season 1: Romantic Entanglement — Style and Fadel experience a breakthrough at the gym, while Bison's commitment to his hitman career begins to waver. Both couples make significant progress, leading to a double date where Kant secretl...
3. Season 1: External Threats Emerge — The hitmen launch an attack on Ruerat, but police presence raises suspicions of a snitch. Fadel and Bison plan revenge against Style and Kant for their deception. The narrative shifts toward danger an...
4. Season 1: Deception and Betrayal — Bison discovers Kant's lie and becomes furious, fracturing their relationship. The couples reunite at Bison's childhood home, only to face an assassination attempt. Style and Fadel find a moment of pe...
5. Season 1: Confrontation and Resolution — The brothers confront Ruerat and interrogate Lilly at gunpoint, uncovering that their dangerous work is far from over. Kant negotiates a deal to protect the hitmen, leading to their arrest and five-ye...