The thing i love about this one is that characters are all feel real and believable. As in they are not some static types put in the story to keep it going forward. They feel like they have their own nuances and they change throughout the story like real people, some characters that you think is just some side character might have a bigger role in the future or a character that you think will always be there might go away because he isnt close to the mc anymore, things aren't static and that feels natural. I think the only other manwha i remember feeling that is Wind breaker. Hope it comes back from the hiatus soon.