The Reincarnated King: the School Beauty's Deskmate Is My Queen

I once thought that youth was just my heartbeat when I peeked at her side face under the setting sun in the classroom. Until I discovered something different about myself. When the scroll of mountains and rivers slowly unfolded in front of me, I realized that my destiny has never changed: to hold the sword for her and hold the flag for the common people. Thousands of years ago, I failed to protect her; in this life, I use my body as a flame to illuminate the ruins, and I also want to take back her name from the hands of fate. In this world of mountains and rivers, would you like to witness that I stand side by side with you?