Devil Beside You
Oh my freaking gosh. THIS is why I watch kdramas. When he kisses her in front of the guy she likes and the guy leaves, then he looks down at her and asks if he should do it again. She doesn't move - doesn't move out of his arms, doesn't even look down or away as he's ready to kiss her again, almost like she's asking for it - and then he realizes it's because she's crying bitterly, staring at him in the face with the misery he's created for her, and as it hits him like a blow she pulls out of his arms and runs away, crying, while he stands there frozen in shock and grief.
OHHH, the drama and angst and delicousness! I have to say, that even though they've sacrificed character development, Devil Beside You is moving along much faster than any other kdrama I've seen.