MTL - Comprehensive Manga: Starting From Teaching Hinata’s Black Coffin, It Will Be Returned 10,000 Times - Chapter 15

In a modern world where cultivators need a place to cultivate or vent their boredom, there are private businesses that set up instance dungeons with the aid of technology and cultivation magic to enable cultivators to train and commoners to experience the life of cultivation. They are called dungeon suppliers.
Xie Jin's one and only dream was to be a dungeon supplier and when his only relative passed away, the relative's inheritance gave him a plot of land and surprisingly, a 'System' Module which the relative had previously used.
With the help of the system, Xie Jin decided to pursue his dream of becoming the number one dungeon supplier.

This is a world where everyone participates in simulations, amidst an eerie apocalyptic setting.Only by performing a Heaven-defying Fate Change in the simulated life can one avoid being consumed by the black mist.Lu Yuan crosses over accidentally and gains an Adaptive Talent, receiving a Divine-level Talent automatically in every simulation!First Life: A modern technology world where Martial Dao is in decline.[Heaven Rewards Diligence]: With every bit of effort, reap a hundredfold reward; even breathing makes you stronger!Second Life: A Magic World, reincarnated as an ordinary skeleton.[Undead Calamity]: Transform into the Undead Dominator, using the Catastrophe Legion to battle against the Abyss Demon!Some Life: Parasitic cultivation, where cultivators are reared by the Insect Race.[Heaven-defying Comprehension]: Deduce the Gu Dao cultivation system, becoming the first Gu Immortal in history!As each Divine-level Talent is activated, the Gods and Demons finally discover in terror…

“You want to steal my genes then leave?” He grabbed her and tried to force her to hand over the child that was born three years ago.

After 20 years of dedicating his life to opera ever since he had quit the performing arts high school, he had failed at an interview. Losing his motivations, Jo Yunjae depended on alcohol to live out his days until one day, he had been sent back 20 years in time, to the day before his high school admission.