The Dark Secret Of His Mermaid

They were so much in love but everything changed drastically when the girl died in an accident. He couldn't do nothing to save her instead of crying while staying by her side as she breathed her very last breath on his arms. 5 years later, a mysterious girl suddenly came into his life, reminding of him to the past as she has the same look as his dead girlfriend. Little does he know, the girl kept a secret from him as she is actually related to his old lover.