Side Effects (부작용)

You believed in me and threw me away
But why am I being swept away?
You believed in me and threw me away
But why does it only hurt?
Step aside (In fact, I)
I'm right (Scary)
Watch and see (Can I do it?)
I'm afraid I can't keep those words
Changing gradually, why am I
Changing inside and out
I'm drowning right now

My head hurts
My head hurts
My head hurts

You believed in me and threw me away
But why am I being swept away?
You believed in me and threw me away
But why does it only hurt?

Ah, wait, I'm strange, why is my focus blurred?
Why doesn't it end, the anxious sound keeps coming
Even here, I keep going
I believed I could overcome everything with overflowing determination
Now I can't bear the arrogance
Is it because I see it too easily and it hurts more?

It doesn't change a hundred times, yah
Why am I, who used to shout, changing
According to the situation around me
Why am I changing uncontrollably?

Just depending on who casually passes by
Why does my reaction change?
I used to like myself, nodding to the rhythm
Now I follow others' rhythm
Will my taste change like this?

My head hurts
My head hurts
My head hurts

Swallowing the pill called self-confidence (Gulp gulp)
Have I taken too much, now it's worry rather than courage (Shivering)
Everything is changing from one to ten (Gradually gradually)
The side effects are rising regardless of my will
No, no, no, no

Ah, wait, I'm strange, why is my focus blurred?
Why doesn't it end, the anxious sound keeps coming
Even here, I keep going
I believed I could overcome everything with overflowing determination
Now I can't bear the arrogance
Is it because I see it too easily and it hurts more?

Ah, my head hurts
My head hurts
My head hurts
My head hurts