In JJK With Naruto Powers - Chapter 102: Yuji and Megumi’s Predicament

In the current era, people are either normal or are with ‘special abilities’. Cases related to the latter are managed by the “National Anomaly Prevention and Control and Special Species Management Office”.
Qi Zheng Emperor Sheng Lingyuan was reawakened a thousand years later after he jumped off the fiery Red Lake. Xuan Ji, a newly transferred staff to the Reparations Division of the Deviant Control Office, finds himself having to clean up the mess of a revived tyrannical monarch. The two seemed to share something from the past, but unbeknownst to them, a big conspiracy is stirring right underneath their noses that could destroy the balance of the world.

- Description from Novelupdates

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.

[You have cleaned the broken sword, Fire Stream. You have been rewarded with 50% proficiency of the Heaven Fire Sword Will.]

[You have cleaned the heavy sword, Dragon Elephant. You have been rewarded with the inner energy of the Dragon and Elephant Divine Art.]

[You have cleaned the demon sword, Dark Wind. You have been rewarded with the Grade 9 method, Phantom Step.]

[You have cleaned the spirit sword, Heaven’s Chance. You have been rewarded with the Eyes that Peek into Heaven.]

“Isn’t this way better than working as the empress’s guard?” Lin Ran quickly decided to remain on the mountain until he had become invincible.

He spent the next 100 years without leaving Mount Sword until the day the barbaric knights from the north invaded the central plains and started to mercilessly slaughter citizens, hoping to break the peace that was obtained through a lot of sacrifices over 100 years ago.

Lin Ran had no choice but to descend from the mountain.

In a parallel world where everyone was a Beastmaster, people would tame, train, and evolve their beasts. The Federal Government would give everyone their own beast egg at their coming-of-age ceremony. However, to evolve and grow the beast, they would need potions, gems, and other rare ingredients. Fortunately for Su Bai, he had awakened the Divine-grade Simplification System. With the system, growing a beast was as easy as it could get. “Lightning Rat detected. The evolution path has been simplified. Plugged in. Evolution points +1, +1, +1…”

“Bubble Turtle detected. The evolution path has been simplified. Shower. Evolution points +1, +1, +1…” “Flame Cat detected. The evolution path has been simplified. Sunbath. Evolution points +1, +1, +1…” A few years later, Su Bai, the Divine Beastmaster accepted an interview. “Mr. Su, can you tell us how you achieved your success?” “I spend my time growing my beasts when other people are showering or sunbathing.”

After transmigrating into a weak noble body, Marvin discovered that he was familiar with the world, this was the game he played in his previous life and… Damn! He only had six months before the Great Calamity!