The reason why BTS' success is so interesting
There are so many kpop boy groups who debuted over recent years. Actually, the boy groups are too numerous to mention one by one. Some of them just disappeared before one knows, while only a very small minority of them became popular. By the way, there is a boy group who has been on the steady rise and succeeded in becoming a well-loved idol group. Yeah, that's BTS(Bangtan Boys).
Achieving success as a idol group of small and medium agency is much harder than you could ever have imagined. Furthermore, the members are not that handsome. Some of, maybe many of you may disagree with this, but they are not 'pretty boys' like EXO or SHINee members. Frankly speaking, I thought they are too ugly to be idols when I saw BTS for the first time. Well, I think they're so attractive now."
Then, how was BTS able to achieve success even though its company is not big? The boy group differentiated itself from the other new kpop boy groups by doing real hip hop music.(It's absurd to say BTS is actually doing "Real Hip Hop", but its music is more hip hop-like than the other kpop idol groups'.) The group made their own music and sang about teenager's life, arousing empathy from young kpop fans.(even though there was a plagiarism controversy over its song 'DOPE'. Do you think BTS copied Flo Rida's 'GDFR'?)
Add to this, the boy group succeeded in appealing to kpop fans because of its image of skilled hip hop idol. Oh, it's not just an image. The BTS members have sufficient performing skills and prove it on stage. They just enjoy their stage unlike other puppet like idol groups.
Especially, Rap Monster, who has polished his rap skill in Korean underground hip hop scene and debuted as a member of the boy group, is getting spotlight by showing off his excellent qualifications. As you know, he was featured as a rapper in the most album of MFBTY, comprised of Tiger JK, Yoon Mirae, and Bizzy, who are considered as heavyweights in Korean hip hop scene.