This OST from Master’s Sun by Hyroin of SISTAR is in C#.
Part 3 is the Bridge.
These are the “cheat” chords I played…
Part 1a: F#M7 - F#m6 - Fm7 - A#m7
Part 1b: D#m7 - G#11 - C#M7 - C#11
Part 1c: F#M7 - F#m6 - Fm7 - A#7
Part 1d: D#m7 - G#11 - C#2 - C#11
Part 2a: [...]
