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- Adv
Regret
Gackt C. Transcription: Lycaon Ra
Key: C, aPopularity: 2.5K - Beg
Regret-Eric Chiryoku
Richard Clayderman
Key: C, aPopularity: 28 - Int
Regret（遗憾）
Richard Clayderman
Key: E, c#Popularity: 14 - Int
Regret
Ethan Snow (Bomb)
Key: C, aPopularity: 516 - Int
Regret
Ethan Fry
Key: F, dPopularity: 232 - Adv
Regret
Misc Computer Games
Key: D, bPopularity: 2.5K - Int
Regret（《女神异闻录5》插曲）- 目黒将司
星村麻衣
Key: D, bPopularity: 5 - Beg
Regret
Kevin Wu
Key: C, aPopularity: 239 - Int
Regret
Masao Aichi
Key: F, dPopularity: 68