They almost kinda remind me of Day6
Not only they all sing and play their instruments, they also write and co-produce their own songs, like Day6
I'm not exactly sure how popular they are in the US but should be popular enough judging from their Spotify streams which the highest is 234 mil I actually don't know how high or low is that, and their lead single from their latest album is 65mil.
I'm just wondering like if Day6 were to try out in the west how would it be like. I kinda don't really see them going for the "idol image", but maybe more of the "band image" like other bands in the US. They also have 2 English speakers which will really help out a lot if they were to try and venture more into the Western market. Day6 themselves have already written a few English songs, and Jae himself also have multiple English songs under eaj.