Well, if anyone is expecting a happy ending, then you’re an idiot. This is an Urobutcher ending where there are gains and losses.
CAUSE I FEEEEEEEEEEEEELLLLLLLL! I CAN SHOW MY EVERYTHING TO YOOOUUUUUUUU!!!! Geez, this song is in my phone forever. Whether you like the song or not, admit it: it’s catchy! Though the PV itself very special, you can’t help but see how fast the guitarists play….and I had a feeling that the lead vocalist is cosplaying Shizuo of Durarara minus the shades.
As for the lyrics, asides the from the memetic chorus, it’s more of a Shinya vs. Shogo situation in which the latter taunts the former into looking for him. With the show ending, this is likely the case.
The video presents Inori (though she looks more like Mana, Shu’s sister) falling down and meeting a blue-haired version of her. There’s a pixiv fanart out there which has Akane and Shinya as the pink-haired and blue-haired Inori respectively. And seeing that, you get the analogy that this song is all about their relationship.
And given by the recent events in the series, the lyrics really tell that Akane wants to help Shinya, who is falling out of his sense of duty. Given Shinya’s selfish and destructive reason for what he had done recently, he failed to realize that there’s one person who wants to help him and that’s Akane. Yeah, this sort of sounds like a romantic relationship. This is a very sad song and it fits perfectly to this series.