MTL - I Recycle Corpses In Konoha - Chapter 117v2 5th generation Hokage

In an exhilarating twist of fate, Jiang Chen traverse into a fantasy realm novel he read, taking on the role of the notorious Holy Son in a riveting tale. But here’s the catch – he’s pegged as the female lead’s obedient doglicker. Or so the story initially wanted…Unleashing the ‘Slack Off System’, Jiang Chen flips the script! Each act of slacking off spectacularly rewards him. Doglicking duties? Jiang Chen smirks at the thought. “Not in a million realms,” he declares.As the system chimes melodically, rewards rain down like immortal gifts:Ding, for successfully slacking off, you receive: the Emperor Weapon, All-Heaven Mirror!’Ding, another round of slacking off earns you: the Immortal Technique, Great Daluo Heaven!’Ding, for successfully slacking off you received: Immortal Emperor Cultivation!’But wait, there’s a twist in the tale! The world around Jiang Chen starts to unravel in the most unexpected ways.The character settings of the female leads have all collapsed.Junior Sister Ye Qingcheng: ‘I can only repay your life-saving grace with my body!’Cold and aloof master: ‘Disciple, I allow you to defy your master.’

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

A child was born unable to cultivate Inner Strength. In order to gain his father's attention and regard, he resolutely chose the painful and difficult path of cultivating Outer Strength. As spring gave way to autumn, time flew by, and the child grew up... he became a young man. What truly changed his destiny was a mysterious Crystal Stone formed from a meteor—the Meteor Tear. This Meteor Tear, unbeknownst to the young man, merged into his body, and like a caterpillar transforming into a butterfly, the young man metamorphosed... And with that transformation, everything changed. And his father finally came to realize the astonishing strength of the son he had never truly invested his Heart Power in...

Fifty years ago, the oxygen in the atmosphere changed, giving rise to a new form of air known as Spiritual Qi. Humans, plants, and animals alike suddenly awakened latent mutant genes and began evolving, gaining Superpowered Talents and Classes. Life took a new turn, and humanity had to adapt.Everything seemed to be going well until, fifty years later, a 16-year-old boy named Klaus awakened a terrifying Talent and Class. His awakening marked the beginning of a new era in human evolution.Unbeknownst to everyone, Klaus, who was shunned by society and dropped out of school to work for a better life for himself and his mother, was actually the last of the Nine Paragons—a being so powerful that even the heavens feared him.Watch as Klaus climbs the ladder of strength, pursuing absolute power with a single purpose: to protect and make his mother happy.