Those Years When I Worked for the Sick and Weak Prince

Ever since I followed the prince, I have been working like a horse and never slacked off. Finally, I seized the opportunity to sharpen my sense of existence. Once I was freed from the slave life, I turned over and directly became... A shadow guard. But it doesn't matter! I have believed since I was a child that I have no control over my destiny. What's more, my wise words are: Be a shadow guard diligently! That's it! The first secret formula! … The last formula of the secret: Why should we always recall this feeling, when the flowers bloom and the leaves fall? —————— The sickly and sinister prince x the shadow guard who is cold on the outside and hot on the inside Please forgive me if the writing is not good^_^Please be patient, I believe the plot will not disappoint you! (Perhaps