10 in which someone falls into water which is far deeper than possible (example, someone trips into a river, but we see him in very deep water that might as well be the middle of the ocean). Typically these are fantasies, but not always. Doesn't need to be a fall.

1. Mr. Queen - palace lake was way deeper than it should be, so ML could rescue FL from drowning

2. I Feel You Linger In The Air - exactly like the example you mentioned, MC fell into a river, but they needed to show a visual of him getting rescued, and it looked like the water was quite deep. I have no idea if the actual river is deep though, so ignore if it doesn't count

3.  The Story of Park's Marriage Contract - the FL is dumped into a well, emerges in a hotel swimming pool built in the same location centuries later

4. The Sword and the Brocade

5. Moon Lovers: Scarlet Heart Ryeo

6. Sunset X Vibes - ML is posing as a model in a shallow, man-made pool of water only an inch or so deep. He is pulled in much deeper and ends up elsewhere.

8. Splash splash love

9. The Brightest Star in the Sky (FL falls into a pool (water is only hip deep) but ML dives in head first (so suddenly it’s way deeper) and later, even though ML already stands beside her, FL is nonetheless able to half drown herself (needing mouth to mouth UNDERWATER XD… it’s hilarious ^^;

10. Lovely runner - fl falls from bridge into a river 

10 dramas where fl is money minded

1. Coffee Prince - FL's is the main bread winner for the family so she is rather money focused. She does work hard for it though.

2. Dreaming of Freaking Fairytale

3. Hyena

4. Penny Pinchers

5. The Atypical Family