The main charm of this BL was the fact that the relationship between the two main characters develops in a very organic way, which is something that can't be found easily in this genre.
The story is about a young man who becomes a new intern in a company and slowly gets to know his team manager. There's no pre-existing hate or love between the two, no incredible connection or inconvenient situation that forces the two of them together other than them being in the same workplace. It's common, I could even say it's realistic, and I loved it. I also greatly appreciated the fact that they're both interested in men from the get-go and there's no trace of the annoying "I don't like men, I only like you" trope that can be easily found in many BLs. Seung Hyun and Jong Chan get close to each other slowly but steadily, make clumsy mistakes and learn to communicate their feelings, but most importantly they aren't just satisfied with being together: they actually put some effort in getting to know each other and letting themselves be known.

The story mainly revolves around their job and little more than that, so I wouldn't call this a slice-of-life exactly, although the overall vibe definitely fits that label. It's also mostly uneventful, so whoever is looking for an intense and dramatic love story might want to watch something else.
It's a short series (each episode is about 15 minutes long if we don't count the opening and the ending themes, so you can easily finish watching in a couple of hours) and it might be a good choice if you're in the mood for binge-watch something cute and light.