Hello Monster
A top detective is reunited with a childhood friend who has since become a leading criminal profiler. Can they join forces to stop a serial killer?
Written by Kwon Ki-young
Produced by Kim Jin-won
Where to watch in 
South Korea
Switch country in the top-right to check availability elsewhere.
Frequently asked questions
Where can I watch Hello Monster in South Korea?
Hello Monster is available to stream in South Korea with a subscription to wavve, Watcha, and TVING.
Is Hello Monster on wavve in South Korea?
Yes. Hello Monster is included with a wavve subscription in South Korea.
Is Hello Monster available to stream for free in South Korea?
Not for free, but Hello Monster is included with a subscription to wavve, Watcha, and TVING in South Korea.
Who's in it
Tap any actor to see their other movies and shows.
More like Hello Monster
Audience picks based on what people who watched this also enjoyed.
Flower of Evil
2020
Sugar
2024
High Country
2024
Come and Hug Me
2018
The Blacklist
2013
Strike
2017
Revenge
2011
The Prosecutor's Proposal
2026
Sherlock & Daughter
2025
Waking the Dead
2001
Tunnel
2017
Truth Be Told
2019
More from Seo In-guk
Their other work, ranked by what audiences actually watched.
She Was Pretty
2015
Death's Game
2023
Doom at Your Service
2021
Project Wolf Hunting
2022
Shopaholic Louis
2016
Running Man
2010
Abyss
2019
Navillera
2021
Master's Sun
2013
Boyfriend on Demand
2026
Oh My Ghost
2015
Soundtrack #1
2022
More from Jang Na-ra
Their other work, ranked by what audiences actually watched.
Fated to Love You
2014
Taxi Driver
2021
Sell Your Haunted House
2021
Cheer Up
2022
Go Back Couple
2017
School 2013
2012
The Last Empress
2018
Happy Once Again
2016
Oh My Baby
2020
Good Partner
2024
VIP
2019
Family: The Unbreakable Bond
2023
Series from South Korea, streaming in South Korea
Men on a Mission
2015
Infinite Challenge
2005
Running Man
2010
Our Sticky Love
2026
Teach You a Lesson
2026
Super Wings
2014
2 Days and 1 Night
2007
Squid Game
2021
Weak Hero
2022
Spooky in Love
2026
A Shop for Killers
2024
Bloodhounds
2023