Su Yu (2020)

from the first few episodes I have found some similarities but as a historical drama instead of a modern drama.
They both show the main lead male being arrogant and full of himself

both have narcissistic male leads and other similar traits. Also in both dramas the FL is searching for a boy from her childhood which turns out to be the ML.

In this the love story is between the boss and his assistant where male lead strives for perfection....they were also aquiantance in past (not childhood) and the one of the lead has lost his memory of the past and how they already knew the other lead before

In both dramas the FL is the long-suffering and confident secretary of the playboy and egotistical ML. The two have a bickering and bantering relationship that grows into a romance.

Just like Su Yu, there was a book that someone wants to stole, first half was a real romcom, and the second.. not. ML had accident and he needed to leave FL. Oh, and there was old childhood friend that was in love in FL :D
I recommend to all that liked Su Yu

Mu Jue Chen is the Qian Mu Mountain Pavilion's Young Master. Dashingly handsome, exceptionally clever, and skilled in the martial arts, he is beloved by his subjects. Unfortunately, he is also exceptionally arrogant and self-obsessed.
His long-suffering assistant Qian Yu, is a young woman who was abandoned at the pavilion as a baby. She has been Mu Jue Chen’s loyal foil for ten years, but after a year of putting up with his quirks, she has had enough. Upon discovering her true identity, she is relieved that she no longer has to be Mu Jue Chen’s footstool, and resolves to leave him forever.
Of course, Mu Jue Chen 'suddenly' admits to himself that his feelings for Qian Yu just might be deeper than he first thought. Actually, there just would be no living without her! Now, how to convince Qian Yu that they really do belong together? Can Mu Jue Chen truly come down off of his high horse and prove he can change?

stone-faced male lead
historical
romance


This is a drama that you can re-watch.
After watching the epilogue I must concur with other viewers that Zheng Ye Cheng raised the bar for the role of General(XY). His chemistry with Hu Yi Xuan (CY)is well portrayed in many heart wrenching scenes.CY is witty, adorable and trusting which touched XY’s cold heart.