# Gong Hyo-jin, Jung Jun-won, Sung Dong-il, and the A Bona Fide Killer Cast Show Off Their Heartwarming, Chaotic On-Set Chemistry

URL: https://technosports.co.in/gong-hyo-jinn-a-bona-fide-killer/  
Published: 2026-08-09  
Updated: 2026-08-09  
Author: Reetam Bodhak

The cast of[A Bona Fide Killer](https://www.viki.com/tv/41613c-a-bona-fide-killer)just gave fans a peek behind the curtain, and it’s exactly the kind of warm, playful energy that makes a hit drama feel like a real family. A newly released making-of video captures the actors goofing around, bonding, and clearly having a blast together.

## A Bona Fide Killer : Overview

| Detail | Information |
| --- | --- |
| **Drama** | A Bona Fide Killer |
| **Content Type** | Behind-the-Scenes / Making-of Video |
| **Featured Cast** | Gong Hyo-jin, Jung Joon-won, Sung Dong-il, Mu Jin-seong |
| **Air Schedule** | Every Friday & Saturday, 9:50 PM KST |
| **Where to Watch** | Viki (with subtitles) |

## What the Video Shows

The behind-the-scenes footage captures a genuinely warm set atmosphere. Gong Hyo-jin and Jung Joon-won are shown brainstorming how to make a scene feel more realistic, cracking each other up as they toss around ideas together.

In a sweet moment, Gong Hyo-jin affectionately refers to veteran actor Sung Dong-il as the show’s steady pillar. Sung Dong-il, in turn, shares that he’d committed to the project purely out of support for Gong Hyo-jin, explaining that while the show doing well would be a bonus, his real motivation was simply seeing her happy.

[Video](https://www.youtube.com/embed/FeZRzXwAizE?feature=oembed)

The video also captures the cast letting loose during the company retreat scenes, playing games and improvising together. When Mu Jin-seong’s character struggles to keep up during one of the games, the entire cast and crew reportedly burst into laughter on set.

## About the Drama

A Bona Fide Killer continues to build momentum since its premiere, recently hitting a new ratings high with its fourth episode. The slice-of-life action drama follows Yoo Bo-na, a woman secretly living a double life as a vigilante assassin while balancing family and career.

For more K-drama behind-the-scenes content and cast updates, check out our **[entertainment section on TechnoSports](https://www.technosports.co.in/)**, and don’t miss our dedicated **[Korean drama coverage](https://www.technosports.co.in/?s=kdrama)** for the latest.

## FAQs

### **Q1. What does the A Bona Fide Killer making-of video show?**

 It shows the cast bonding on set, brainstorming scenes together, and having fun during game segments for the company retreat episodes.

### **Q2. When does A Bona Fide Killer air new episodes?**

New episodes air every Friday and Saturday at 9:50 PM KST.