MTL - World of Immortality - v2 Chapter 403 aunt and nephew

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

[WARNING: MATURE CONTENT]

“You don't know what love is? I will teach you.” his deep, husky voice made her shiver. His hot hands were roaming freely around her body, making her jolt in a unique sensation she never felt before.

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She is a curious student who wants to know about pleasure and he is a patient teacher who knows everything she wants to learn.

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Growing up in the temple, the troublemaker and yet pure-hearten and innocent Veronica decided to go outside the walls. Her first time experience ended with something disastrous. She learned about a unique part of male body she never heard of its existence. He found out about her deepest secret that no one should have known,

That's how their fates tangled. She soon realized, her heart pounded whenever he touched her. His hot gaze would give her goosebumps.

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

Kang Min-hyuk, the loser of the checkpoint, gained a high-level magical civilization and everything changed.