This song by One Ok Rock is in C#.
These are the “cheat” chords I played…
Intro: C#2 - F#2 - C#2 - F#2
Part 1a: C#2 - G# - D#m7 - F#2
Part 1b: C#2 - G# - D#m7 - F#2
Part 2a: D#m7 - F#2 - C#2 - G#
Part 2b: D#m7 - F#2 - G#4 - G#
Part 3a: C#2 - F#2 - D#m7 - G#4
Part 3b: C#2 - F#2 - D#m7 - G#4 - G#
Part 4a: F#2 - G#4 - D#m7
Part 4b: F#2 - G#4 - D#m7
Part 4c: F#2 - G#4 - D#m7
Part 4d: F#2 - G#4
Part 4e: F#2 - G#4 - G#