《Wanna U Back》的歌詞如下：
中文版：
(Verse 1)
每一次閉上眼，又想起你表情
過去的記憶里，有過開心甜蜜
突然好想你，不想壓抑心情
忍不住打開視窗尋找你訊息
(Chorus)
想和你回到那個起點
就算陌生人也想要你陪在身邊
不知不覺又被回憶糾纏
找尋回當初那種感覺就好
(Bridge)
哪怕你不回頭，默默離去的我也想要回抱
仿佛觸碰了倒流時間，一點點化作回憶的顏色
漸漸加深、消散…停留在了你身上模樣消失的時間中又漸漸靠近了一點點，你在哪兒？在我腦海中一晃而過再次發現卻又停住了你給的那種觸感不再離開你的手多一秒。我望眼欲穿想看看你現在怎樣的狀態模樣不再醒來, 那樣的夢中我一再遇見一次一次將你的名字貼在心間轉了一圈回來重聚現在如何能再讓你看見? 一次次的把照片放進口袋現在口袋裡的溫暖再也沒人撫摸（rap）
(Outro)
讓我再一次，回到那個時間重現想你，等你出現…
英文版：
(Verse 2)
Every time I close my eyes, I see your face
Memories of the past, happiness and sweetness
I suddenly miss you, I don't want to suppress my feelings
Can't help but open the window to search for your messages
(Chorus)
I want to take you back to that starting point
Even strangers deserve to have you by their side
Without realizing, I'm being entangled by memories
Just find that feeling from before, that's all I want
(Bridge)
Even if you don't turn back, I want to reach out and grab you in passing
As if I touched a time machine, slowly fading into a colorful memory
Deepening and dissipating... Sticking to the image of you that disappeared in the flow of time I can feel your touch again for a moment longer than before. It doesn't end I look around for you wondering where you are now. In my mind, you flash by again and stop You gave me that feeling. It won't leave my hand for a second longer. I want to see what kind of condition you're in now. The image of you no longer wakes up. In my dreams, I keep running into you again and again. I stick your name to my heart and spin around. How can I let you see me now? Over and over, I stick photos in my pocket. The warmth now inside is no longer touched by anyone (rap)
Outro:
Let me take you back to that time again and relive the feeling of wanting to see you, waiting for you...come back.