It's listed in the description under "the title of the original songs". I don't blame you for not noticing, because the web design is kind of hard to make sense of. I considered posting links to the originals, but that would clutter the interface.
I intentionally picked songs with adaptable names; ones that are long, and not ubiquitous like "Ending". I could tell you what the names are supposed to mean, but I wanna leave it open to as many contexts as you can think of.