Longing girl

A drunk college freshman named Lee Sungmin had a one-night stand with a mysterious masked lady. His time with the masked lady was so unforgettable that Sungmin seeks to find out who she is. As he suspects the female friends around him, the identity of the mystery woman is unexpected

Cha Woomin is a private investigator whose specialty is to catch people cheating on their spouses. A rich husband hires Woomin to spy on his wife due to his suspicions of her being unfaithful. But as Woomin spies on this woman, he falls for her and learns the true side of her husband