Revenge Note 1 is a bit of a change of pace for high school rom/coms, as it has an idol-level looking guy who falls for a somewhat plain-looking girl, and he remains faithful to her despite several attempts by other girls to date him. The comedy comes from all the bad people in the show getting "revenged" upon by a website run by a mysterious revenge master.
If you saw "I'll Come to You When the Weather Is Nice" you will see Kim Hwan-hee, the younger sister from that drama ("Out of my way!" was her stock phrase)) in this one as well. I thought she was the best thing about "Weather" and I think she's the best thing in this one also. There is a Revenge Note 2 which I haven't seen, as I came to realize it's mainly a rom/com written for teens, but that might be fine for you.