NoirRoseHeart:

No one had face blindness in the Beauty Inside movie from what I remember, and I've seen it like 3 or 4 times.

Oh, sorry, I've confused it with shape shifting which both titles have in common

It was just a bonus anyway

1. Call It Love - FL's dad and ML's mom had affair, FL wanted to ruin ML's life just as his mom ruined hers

2. Empire of Lust - FL becomes ML's mistress to get revenge on his son

3. Eve - ML was involved in FL's father's death

Bonus: Crazy Love - she didn't initially approach him for revenge, he was her boss but she pretends to be his fiance to get revenge after she thought his bad attitude at work was the reason she's got cancer (misdiagnosis) 

4.  Hell For You - FL's ex best friend stole her crush & tried to kill FL

Parent(s) murder grudge - the one holding grudge and want to avenge

5. This Live, This Generation - ML

6. City of Streamer - FL but maybe I remember wrong since it's not mentioned in the synopsis

6. Ryusei no Kizuna - FL (+2 brothers)

7. Be Moon - 2ML

As the topic stall, more titles

8. Perfect Marriage Revenge - FL

9. Bloody Heart - FL

10. The Glory - FL

10 titles for which leading characters gained/lost weight

1. Weightlifting Fairy Kim Bok Joo - FL gained

2. See You in My 19th Life - ML lost

3. Oh my venus

4 Birth of a Beauty

5. Let's Eat Something, Anna

6. Plump Revolution - FL weight gain

7.  Motel California - ML weight loss

8.-50kg no Cinderella-FL loses weight

9.My Calorie Boy - ML loses weight

10.  My Name - FL gained  weight 

Someone else can choose the next topic

10 dramas where a character works in their company to learn the ropes, but they arent the  CEO yet

1. Roommates of Poongduck 304