It definitely has undertones of sexual tension. I've watched friendship bromance, and more is definitely implied…
You do realize that the English subtitles/ dub misses a WHOLE bunch of context in Korean right? Also that is some that I've heard countless times when a female lead is talking to her best friend of any gender.
"Also, the plethora of shirtless scenes between them, the long stares, angst and the fact that they live together for much of the drama"
I can name a few kdramas where there are a whole bunch of shirtless scenes with long strares, and angst Off the top of my head D.P., worst of evil, Vigalantee, squid Games, beyond Evil, bloodhounds.
There are a ton more that I'm forgetting, not everything has to be shipped.
"Also, the plethora of shirtless scenes between them, the long stares, angst and the fact that they live together for much of the drama"
I can name a few kdramas where there are a whole bunch of shirtless scenes with long strares, and angst Off the top of my head D.P., worst of evil, Vigalantee, squid Games, beyond Evil, bloodhounds.
There are a ton more that I'm forgetting, not everything has to be shipped.
Sir then what are you? The leader of divine feline cultivation?
If you looking for BroMANCE try the untamed