Naze Boku no Sekai wo Daremo Oboeteinai no ka?

Phy Sew lu, ele tis Es feo r-delis ec I., Why Does Nobody Remember Me in This World?, Why Doesn't Anybody Remember My World?, Why Nobody Remember Me in This World?, 어째서 아무도 나의 세계를 기억하지 않는걸까?, なぜ僕の世界を誰も覚えていないのか？, 为何无人记得我的世界