I think it might be his family's clothing line actually. I believe he said during a vlive, a couple months ago, that his family makes clothes. I think they are doing a new line or something and he had a part in coming up with the name. It's been so long that I don't know for certain that what I just said is completely true. However, I do know that he said that his family makes clothes and they were going to coming out with something. Yeah.

Instead of editing my comment, I decided to write a new one. BM discussed on vlive that it actually is his line. He really wanted to make his own line and since his family makes clothes, he has the opportunity to do it now. He said that it's really clothes are made from really good material.