As Sukuna in Invincible - Chapter 9: Friends

When humans step into the Galactic Era, the ancient art of cultivation thrives once again.

Chi Yan had always had a weak constitution, and ghosts had always tried to kill him. He had tried many ways to change his situation, but it was all futile.

Coincidentally, Third Master Ye of Shiming City passed away, and a priest informed Chi Yan that Third Master Ye possessed the “look of demon,” Carrying a bit of this man’s ashes and installing an altar for him at home could help control the evil spirits around Chi Yan.

Left with no choice, Chi Yan took a gamble. Amazingly, it worked. However he didn’t expect that he’d be instead be haunted by the most persistent ghost of them all.

Obsessed with love, undying resentment, possessed by evil.

- Description from Novelupdates

In typical Mary-Sue novel, readers all like the second male lead who only loves the heroine wholeheartedly and is willing to give up everything for the heroine, but the heroine only loves the male lead who once abused her body and heart.

Readers: Why doesn’t the heroine love the second ML, the demon sect leader?!

The demon sect leader: This Devil Venerable also wants to know, why do I like her?

In order to find out why the female lead doesn’t like him, the self-conscious demon sect leader set out to “interview” all the characters in the novel.

———

When a book was dropped into his lap, the demon sect leader discovered the world he lived in was described in it. This book said that after he sacrificed himself for the female lead, the 4th male lead, his silent, loyal subordinate, blackened and attempted to kill her.

The demon sect leader, Wen Renhe: Yin Hanjiang, this Devil Venerable wants to know why you wanted to kill the heroine.

Yin Hanjiang was silent.

Wen Renhe: If you refuse to speak, this Devil Venerable will force you to speak!

Yin Hanjiang: …

Wen Renhe: What are you blushing for?!

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