Chained to my past

Min Yoongi is a world famous psychiatrist from South Korea. He is also a popular author and writes under his pseudonyms Suga and Agust D. He is known for being reserved and is surrounded by a mysterious aura. He's haunted by his past. One day he starts hearing a female voice singing a melancholic song and thinks that he has finally lost it. He is then visited by a ghost of his past. He has to face his past and make amends before his conscience makes him descend into madness.