Wu Ran (2024)

Both leads are supernaturally bound together with any pain/injury the FL suffers going to the ML, unknown to her.

Plot of Love in Devil sounds pretty similar to TTEOTM...
But one is short length series and other a full length drama

In both dramas, the ML is a demon lord who is bound to the FL through a magic connection that causes him to feel all pain and harm done to the FL. In both, the ML falls first and hard and is very smitten with the FL. The MLs in both dramas are styled similarly.

Love in Devil is a mini-series and much lower production value than LBFaD.

Both are Xianxia mini-series where the FL has a mission to stop a Demon Lord but falls in love with him instead. Both have gorgeous MLs who fall first and hard, and mischievous silly FLs who turn more serious as the plot progresses.