Yeah, it's that Swimming Anime...
Even if you aren't particularly a fan of Free! or anime in general, Dried Up Youthful Fame is a song about moving on, about friendship, about being confused about your future, but moving ahead boldly anyway, and that's something universal. Ta_2's brilliantly expressive voice conveys the emotion perfectly.
Abendsonne deserves its own paragraph. My feelings about this song are hard to put into words, because it's beautiful. Achingly beautiful. It's my go to song when I'm feeling down. It's gorgeous, sad, and peaceful; just like an abendsonne. Honestly, give it a listen!