[Happy] 幸福吧 我们 :-) ■ Credit 01. Happy Composed - 서달달 Lyrics – 서달달 Arranged – 서달달 문태현 Ukulele - 서달달 Melodion - 서달달 Piano & Synth – 서달달 Bass Guitar – 문태현 Chorus – 서달달 Album art & Artwork – 상냥한 세상 Mixing & Mastering - 문태현 at 나무스튜디오