It's between Reflection and Stigma.

Reflection's a great noise blocker. It maintains a consistent calmness, smothering the atmosphere with its own blanket of sound. It masks other sounds and mollifies distractions. It's an instant portal to serenity each time I listen to it. Rap Monster's voice is also utilized in the smooth, relaxing manner I enjoy most from him, and the lyrics are nice. I like to listen to this one on repeat a few times in a row in bursts.

Then there's Stigma. It's such an interesting song lyrically, and unique in the scope of Bangtan's discography. I like the simple neo soul thing going on and the emotion you can hear in V's voice, like when he says "at any rate I'm hurt" and "you must have something more to say." I actually submitted it to a project about music for abuse and trauma survivors, where we pick a song and very briefly say how we interpret it and relate it back to ourselves in order to help us. The project gets a lot of submissions though, so mine won't be posted til some time in June at earliest. But yes, I consider this to be my favorite in tandem with Reflection.