This song by Shiga 连诗雅 is in B.
These are the “cheat” chords I played…
Part 1a: B2 - F#/A#
Part 1b: G#m7 - E2 - F#4 - F#
Part 1c: B2 - F#/A# - D#
Part 1d: E - F# - B2
Part 2a: E2 - D#m7 - G#m
Part 2b: C#m7 - F#11
Part 3a: B2 - F#/A# - G#m7 - [...]
