Day 21 - One UVERworld song that you could listen to forever

I guess it's Awayokuba Kiru. Why? I have no idea. And for the past month, that has been the only song on my playlist. I play that song when I'm about to sleep, when I'm doing my work, when I have to do business in the toilet, and when I go for a walk. It has only been that song. Just recently I've been alternating between Awayokuba and The Over.