Rebirth: I Am Super Rich in Apocalypse - Chapter 61 - The Mysterious Rich Older Sister

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

Mei Fang’s rebirth story takes him back 20 years to the year 2002, becoming a 6-year-old boy who just wet the bed during nap time.On this same bed-wetting day, he tightly grasped a fate he had overlooked in his previous life, a love story spanning beautiful years, thus beginning a new journey—“Mei Fang, the three of us, are we going to be forever and ever, always good friends?”“Pinky promise… it’s a deal… no change is allowed… for a hundred years.”From a well-behaved little angel to a mischievous little devil.From a troublemaking wild girl to a cold and aloof female top student.The personalities of these playmates who spend their days together will evolve with the changing circumstances. Do you still like the way she was at the beginning?Playing with childhood sweethearts, and frolicking through the day, their paths crossed at the doorstep of their youth.Not shy or reserved, only infatuated without constraint.

[Ding! Congratulations to the host for obtaining the 9-Tailed Heavenly Demon Fox Bloodline.]The Celestial Fox Deity: “Little Ancestor, our geniuses are struggling to advance their bloodlines. Could you spare just a small drop of your diluted blood?”…Cain wakes up only to find himself transmigrated into a novel that he had read a few years before his death.In this new fantasy realm where the strong are respected and the weak are trampled, Cain awakens his “Unique SSS-Ranked Primordial Beast Master Talent” before an error happens and merged with “Extra’s Harem Gacha System” which can help him become stronger by having sex with powerful women, including those summoned from the system’s Summon Pool.[Ding! You have shared an intimate moment with the Goddess of Light][Ding! You have received …% of her stats attributes][Ding! You have increased her stats attributes by …%]After merging his talent with the system, he can also contract and evolve powerful beasts, instantly upgrading their ranks using Evolution Points.With the ability to convert money into Evolution Points, Cain decides to build his own force, amass wealth, and take full advantage of the system’s potential to rise above all.[Ding! Do you want to refine the Ice Dragon’s Evolution Pill?][Ding! Do you want to refine the medicine liquid of God's rank?][Ding! Do you want to refine the Godbreaker sword of the God’s rank?]…