A brief description of the light novel Signing In At Mount Sword For 100 Years To Become Invincible:
# SWORDMAN # EMPRESS # LOVEY-DOVEY
Lin Ran was transmigrated to a fantasy world and was the top scorer during the martial arts exam.
He was assigned to protect the empress, but because he did not give presents to the general director in charge of the palace affairs, he was demoted to a guard at Mount Sword.
His only job was to clean the swords stored on the mountain.