Birthday
 作词 : Dept/Pat Kiloran/clam
 作曲 : Dept/Pat Kiloran/clam
 编曲 : Dept/Lee Jaesun/SUDI/clam/xlydia
 Woke up in the morning
 Feeling out of place
 Until I thought a little bit
 About your face
 Yeah, it's true
 I can't stop thinking about you
 I don't even know who I was before
 You burst into my life
 And broke down the door
 Yeah, it's true
 I can't stop thinking about you
 About you, about you
 Ooh
 I can't stop thinking about you
 And all the time I've spent around you
 It makes me feel alive
 Ooh, ooh
 Ooh
 Maybe we met in a past life
 The way I fell for you so fast
 I need you to always be mine
 Ooh, ooh
 Not another second
 No, I can't wait
 I need you right now
 In a thousand ways
 Yeah, it's true
 I can't stop thinking about you
 I can't explain it
 You're so amazing
 It's like I'm born again by being with you
 Baby, It's true
 I can't stop thinking about you
 About you, about you
 Ooh
 I can't stop thinking about you
 And all the time I've spent around you
 It makes me feel alive
 Ooh, ooh
 Ooh
 Maybe we met in a past life
 The way I fell for you so fast
 I need you to always be mine
 Ooh, ooh
 What would I ever do
 If I'd never met you
 And held you close
 Where would I ever go
 No, I don't wanna know
 'Cause I can't stop thinking about you, no
 Ooh
 I can't stop thinking about you
 And all the time I've spent around you
 It makes me feel alive
 Ooh, ooh
 Ooh
 Maybe we met in a past life
 The way I fell for you so fast
 I need you to always be mine
 Ooh, ooh
 Ooh
 Will you always be, always be mine
 Ooh
 'Cause I can't stop thinking about you
 About you, about you
 Ooh
 About you, about you, baby
 Ooh
 'Cause I can't stop thinking about you
 Will you always be mine
 贝斯 : Lee Jaesun/clam
 母带工程师 : Jeon Hoon
 鼓 : Dept
 钢琴 : xlydia
 人声 : Dept/Pat Kiloran
 混音师 : Andnew