韩剧《49天》的主题曲名为《以为只会忘记》，由徐英恩演唱。这首歌曲的时长为4分11秒，收录在《49 Days OST》专辑中。以下是韩文歌词的一部分：
1. 목이 메어서 말도 못하고
한참 멍하니 하늘만 보고
난 울다가 잊으려고
제발 잊자고 난 혼자서
2. 그만하자고 내게 또 말을 해
속이 상해서 속이 다 타서
사랑 따위는 내겐 없을 거라
말을 해
3. 그만 잊자 제발 그만 잊자
다짐을 해도 너의 모습이
더 나의 가슴에 돌아서
4. 별일 없잖아 나를 잊어도
며칠 있으면 좀 괜찮을 거야..
5. 한참 울다가 웃다가 잠들고
전화기를 들고 다시 내리고
난 바보처럼 그저 바보처럼
왜 며칠째 이러는데
6. 보고 싶어 미칠 것 같아
그만 잊고 싶어 미칠 것 같아
나 힘들어서 너무 힘들어서
눈물이 앞을 가려
7. 너의 모습이 아른거려
이젠forgetting the lyrics, but here's a portion translated into English:
1. My throat is blocked, I can't speak,
staring at the sky blankly,
I cry and try to forget,
please, let me forget.
Alone, I tell myself to stop,
my heart aches, it's all on fire.
They say love doesn't exist for me,
they say.
2. I promise to stop, to just stop,
I'm all alone, I tell myself,
no more, that's enough.
My heart is so heavy, it's all confusion,
love and such, I have no part.
3. Please, just forget, I plead,
I promise, but your image keeps returning,
it circles back to my heart.
4. It's just an ordinary day,
if I forget about me for a while,
it might be alright...
5. Crying, then laughing, then falling asleep,
picking up the phone, hanging up again,
I'm such a fool, why do I keep doing this?
6. I want to see you, I'm going mad,
I want to forget, I'm going mad,
I'm so tired, too tired,
tears block my sight.
7. Your figure seems blurred,
now, even when I try to forget,
it feels like it's time to let go,
why am I still struggling?
Why can't I just forget,
and why can't I make myself turn back?
I'm...
Please note that the lyrics provided are not a complete translation and may not be entirely accurate. The context of the song and the emotions it conveys are important to the understanding of the drama's themes and the characters' experiences.
