Uzumaki: I can comprehend anything - Chapter 8: S Rank Jutsu

Noah Morgan has been labeled a loser, mocked by peers, and betrayed by loved ones. He is a man that society loves to ridicule and despise. He hits rock bottom when the person he trusted most turns against him publicly.However, just as everything falls apart, an envelope with a Phoenix stamp slipped inside his boring flat, revealing a shocking truth: Noah is the illegitimate son and heir of a secretive but powerful trillionaire.Noah inherits money and much more; he inherits a Wealth Management System, a digital interface that could assist him in expanding his wealth, unlocking hidden assets, and gaining abilities to influence people, increase his physical power, and get revenge on people who have hurt him.Now, Noah rises from the ashes with nearly unlimited wealth and resources.His enemies laughed and ridiculed him once, but soon they will learn his vengeance.

“Jiang Yu transmigrates into a novel and becomes a side character in the book.

The hearse with the weird odor slowed to a stop before the entrance. The sound of pebbles could be heard bouncing on the ceiling. There were footsteps coming from the corridor, and there seemed to be someone sawing next door. The door knob to the room rattled slightly, and the faucet in the bathroom kept dripping even though it had been screwed shut. There was a rubber ball that rolled on its own underneath the bed. Wet footsteps started to surface one after another on the floor.
At 3 am, Chen Ge held a cleaver in his hand as he hid beside the room heater. The call he was trying to make was finally answered. “Landlord, is this what you meant by ‘the house can be a little crowded at night’‽”

- Description from Novelupdates

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?

Having the capability to destroy humans, elementals, and gods, after a long period of countless wars and strife, Arnos the demon lord became sick and tired of all that and longed for a peaceful world, so he decided to reincarnate to the future.

However, what awaited him after his reincarnation is a world too used to peace that his descendants became too weak due to a huge weakening in magical powers.

Arnos enrolled in the Maou Academy established to find any students that might be the demon lord’s reincarnation, but his powers are too extraordinary that those in the academy couldn’t properly judge his powers, so he’s regarded as an “Inept student”. Being underestimated and avoided by most people there, he recruited a girl friendly to him, Misha, as his subordinate and comrade, and strives to climb to the top of the demon race hierarchy to one day reclaim his former title and status.