Deep in the Heart

Do-Jin lost interest in all other women after a one-night stand with Yij-Young. He just cannot stop thinking about the woman that he met that night, and will do anything to see her again.

Source: Toptoonplus

Note: There’s two versions of this. This is the Toptoon+ version, Deep in the Heart. The other version is LezhinX, under the name Deep and Distant. Only differences are the different publisher choices for the same story.