If you like an obsessive love then The Heirs fits you the most.
It's like a modification story of Boys Before Flowers. First of all because Lee Min Ho plays again as a heir. But in this drama, Min Ho plays a smooth version of Gu Jun Pyo in Kim Tan's profile. But still he plays a possessive role that makes his kiss much arousing especially when Cha Eun Sang is about to be sent to abroad. Obseessive love is the theme of the story.