Shim Bokyung - Tumblr Posts
Psychopath Diary and that 'i want a baby' meme
Heo Taek-soo | Shim Bo-kyung

Seo In-woo | Yook Dong-sik

Yook Dong-sik | Shim Bo-kyung

Seo In-woo | Shim Bo-kyung

Jang Chil-sung | Yook Dong-sik

Gong Chan-seok | Park Jae-ho

Seo In-woo | Jo Yoo-jin

Rewatching Psychopath Diary and Strangers from Hell really makes me wonder if someone was working on both sets at the same time because the amount of things in common...
A. GENERAL STUFF
1- both came out in 2019
2- contain a song by The Rose (or its lead singer, Kim Woo-sung)
3- similar themes (murderers) (although that's about 99% of k-dramas)
B. YOON JONGWOO AND YOOK DONGSIK
1- both writers
2- work an office job
3- annoying coworker/sort of friend called Jae-ho
4- their superior hate them
5- fantasize about murder (like, a lot)
6- (threaten to) beat up one of their colleagues with weird objects

7- one parent that works in the food industry, the other that is nowhere to be seen
8- speak to their evil reflection in the mirror
9- no one takes them seriously
10- keep being dragged into work dinners
11- interest in 'dark' media (crime/horror)
12- one of their neighbour decided to befriend them even after they acted very weirdly
C. SEO MOONJO AND SEO INWOO
1- look very polite and nice to most people
2- same family name!
3- odd relationship to their parental figure (they want to kill them)
4- like to collect things from their victims!

5- really really want to convince a random guy to commit murder
6- tactics to convince someone to commit murder includes saying vague stuff like 'we're so alike'
7- please refer to this post for more details
D- SO JUNGHWA AND SHIM BOKYUNG
1- cops. That one's pretty simple
2- dad was also a cop (and a famous one)
3- only cop to do any work whatsoever in the whole city
4- on more or less good terms with both the actual serial killer (moonjo/inwoo) and the wannabe serial killer (jongwoo/dongsik)
5- gets kidnapped by one of the killers at some point
6- work based on their instincts
Thank you to @softneomiro for pointing out some resemblances I hadn't seen before!

