I finally get to write a review.
If you like watching Ancient Chinese Drama, Xianxia. I do not think you should ever miss Lost You Forever. I am not a fan of Xianxia. I just come to watch it this year.( This is my second Xianxia of 2023. First one being the longest promise and then this one. I am more intrigued here.)
And I could not move on from this drama yet.
In short, the plot, the production, the actings, the sounds track are so awesome and superb and perfection. The storyline and characters are quite in depth though not at first sight.
This is a drama where the female lead who had to involved with 3 male leads + 1. Because the forth one scenes are a bit low. Not as vital as the first 3.
This is a story about a princess who had lost her way during the battles three lands/empire. She had even lost her identity of being female and turn herself into a man so that those want to harm her did not recognize her. On her way of life she met a tortured _begger_ like _man Tushang Jing, nurses him back to health. He is later found to be the head of Tushang, 9 tail fox clan. Another one she encounter in a man body, is Xiang Liu, the 9 head demon general, whom she had to exchange with her medical blood (her blood is medicine) to stay alive and other stuffs. And then she finally get to reunite with her cousin or brother (not real brother though) whom she had much deep relationship with when they were kids. After transforming back to being princess, there is another suitor who become fond of her too. Politics schemes and battles are on the way. And romance is in the air.
Characters
Xiao Yao/Wen Xiao Liu played by Yanzi
She's played as a young man or boy for half of the show. Yet her feminine aura is still on. And two of her men know she's a woman. She is free spirited, fierced at times, cheeky and kind. She is very loyal to those whom she care. Nevertheless, her wish in life is find someone who will love her and accompany her through life than any other life legacy.

Cang Xuan played by Zhan Wanyi
He's the future emperor who indeed has goals and ambition for good, and protecting those whom he loves. Because he had experienced loss and tragic. His journey to the throne is not easy. It has to take lives and blood of many people. It may also take away his only happiness at heart too, as the woman whom he loved since childhood has different goals in life especially at heart matters, although she is very loyal to him.

Tushang Jing/Ye Shiqi played by Deng Wei
The gentle master of nine tail fox clan. But he was stripped off nearly all his power by his brother. Tortured for years. Finally looking like a tortured disable begger whom our female lead had to look after him back to health. He in return, looks after her and her residence. Comfortable Domestic Home that will care for her and make her relaxed. ❤️ It has given him new life since. Hatred and revenge are not for him. He is determined to live with her throughout life. But this is a ruthless world, and sometimes dealing matters in the right gentle nature can make him lose the woman he loves dearly (nearly).

Xiang Liu played by Tan Jian Ci
The badboy in white with smooth silver hair. The nine head demon who own nine lives and lived for so long. He is mostly rough with Xiao Yao/Wen Xiao Liu initially, and even uses her to gain benefit to his side. Push- pull tension, nonsense bickering and teasing are how their relationship go. Nevertheless his attraction to our female lead is deep indeed. He does care greatly for her. Act like her guardian angel. Help her with his own lives and teach her to protect herself. Nevertheless, their loyalty and goals lies in just opposite ways that he is mature enough to not persue her to be by his side.

Feng Long played by Wen Hong Yi
He is a bachelor with goals and dreams too in which he listened his business friend Tushang Jing, to support Cang Xuan in getting the throne. He met the lady of his dream, the princess. Not knowing that she is also loved by other three men already, her presence are what makes him comfortable.

This is my take so far on plot and characters so far.
I am yearning for second season to come as soon as possible. I am still listening to the Osts. Long love sickness and favor mortal fireworks are my two favorite songs here.