I Became a Scoundrel of a Chaebol Family - Chapter 451

Lu Yanzhou’s best friend Xie Chengze’s soul was broken into fragments and fell into those small worlds. In order to save Xie Chengze, Lan Yanzhou embarked on the journey to collect Xie Chengze’s soul fragments.

However, he made a mistake in the process of collecting his soul fragments. He fell in love with Xie Chengze’s soul fragments.

Xie Chengze said he cultivated the ruthless dao. He was cold hearted and emotionless but he has always regarded him as a brother. He took advantage of when the other party lost his memories to fall in love with him…

The end of the first world, Lu Yanzhou, who was in love with Xie Chengze, was struggling: “When Xie Chengze recovers his memories, will he beat me up?”

After the end of the second world, Lu Yanzhou, who had another romantic relationship with Xie Chengze, made up his mind: “There’s absolutely no next time! Xie Chengze probably won’t break off all relationships with me?”

The end of the third world, Lu Yanzhou was apprehensive: “I’m here to save him..”

The Nth world ended, Lu Yanzhou broke the jar and threw it: “Wait until Xie Chengze recovers, I’ll go after him. There might be a 1% success rate, right?

Xie Chengze: “…” I took the initiative so much, are you blind?

- Description from Novelupdates

[Of all the music I’ve ever heard, it’s your voice that calms my soul. He whispered]***Tang Xue Mei was the legitimate heir of the company, but her best friend caused her to lose her sight and her status. She was tortured every day until she ended her life. To her surprise, she was reborn three years before her death!Now, she isn't going to waste her second chance. With a new lease on life and the determination to change her fate, Xue Mei finds herself entangled with a man suffering from insomnia, who offers her power in exchange for her help in curing his sleep disorder.Feng Shihan, CEO of AG corporation, had everything from looks, fame and wealth, but he could never get a good night's sleep due to his rare severe sleeping disorder. Until he met Tang Xue Mei, he never thought he could get a decent sleep.But then he finds out that as long as she's on the bed with him, he could sleep as well as he liked. She was his miracle sleeping pill.Soon he finds out she’s difficult to get, so he proposes a form of alliance to her.“Miss Tang…if you agree to be with me, I’ll give you all the power you need…”In a desperate attempt to gain power and get back at those who had hurt her, she agreed to his request.

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

Just became the disciple with the highest seniority, but the Age of the Dark Mist descended, and the sect plummeted into a land plagued with raging demons.

Shen Changge who had already written his suicide note suddenly awakened to a Check-in System.

[Check-in at Sword Lord Statue, Success, acquired: Empyrean Sword Manual]

[Check-in at Training Ground, Success, acquired: Cultivation Base*50 years]

[Check-in at Sword Clout Mountain, Success, acquired: Sword Clout of Destruction*1s]

…

In the Age of the Dark Mist, demons were rampant, and an impenetrable mist veiled the empyrean. By vanquishing demons, the mist could be dispelled, and new check-in locations could be unlocked. By doing so clandestinely, Shen Changge became a Sword Saint.

When a demon broke into the Empyrean Sword Sect, everyone in the sect was powerless. People were in despair, until they met that young man in white who had just checked in at the Empyrean Peak. The young man’s eyes were ablaze.

“Submit, demon.”