《2AM REGRET》的歌詞如下：
日文原版
愛しても 屆かない
思いは 儚い花火
獨りで抱え 淚こらえ
悲しみに暮れても
噓つきだって 優しさ忘れない
忘れられない 優しさ涙に暮れても
あなたを思う気持ち
苦しいのに 愛してる
離さないで そばにいて欲しい
心が決めた 戀なら
抱きしめてほしいのに
英文版歌詞翻譯
2AM regret
Lying in the darkness
The love that I had
Has disappeared from my memory
A love that seemed to have existed forever
Was torn apart like a dream that couldn't be realized
Alone, I keep crying
In the shadow of sadness
I won't forget the kindness you showed me
Even if I feel the tears streaming down my face
I can't lie to myself anymore
I can't let go of you
I want to be with you by my side
When my heart has made up its mind
I want to hold you tight, as I yearn for our love
Oh how I wish that time could stop right now…
I feel sad for missing you, and I'm still in love with you…
然而實際日文歌詞並未變化，可能是因為想要表現“放不下”“執著”的情感，所以將英文版歌詞中的“苦しいのに”和“離さないで”進行了保留。這首歌表達了對於曾經深愛的人無法忘懷的情感，以及希望能夠重新回到他身邊的心情。