To jam and learn Ging Nang Boyz - Koi Wa Eien chords, your primary focus should be mastering these chords sequence: D, Gm, Bb, D, Gm, Eb, F and Bb. A strategic approach would be to train at 65 BPM initially, and then accelerate to the song's tempo of 131. With the song's key of D Minor, set your capo to fit your vocal range and chord choice.