MTL - Sword Among Us - ~ Market opportunity (recommended, with YY number)

A life filled with regrets.Once he realized his faults and decided to lead a new life, it was too late.His family was already gone.He had borne through each day with pure rage.Finally at the end of his misery, his wish reached the heavens—an unforgiven one.He goes against fate to raise his sword.

Michael was suddenly reborn into a another world by a God because of an accidental death. To make up for this fact, the God gave him another life in a fantasy world of swords, magic, and monsters.Unfortunately, it turned out that the world he was reborn into was still stuck in the medieval times. It didn't have electricity, it didn't have proper plumbing, and it didn't have any technology that he was so used to back in his old world.But thanks to the God's blessing and an AI assistant called ChatJK1, he was given the power to MAKE his life comfortable. Slowly, Michael transforms this new world into a place even better than his previous one by taking ideas from the modern world and putting it in this world, with the added bonus of magic.

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

(Completed) She and he were born on the same year, month, day, and time, and on their first day of life, their unscrupulous parents arranged their future marriage.From then on... she began to cling to him.As a child, Luo Mengmeng would say in her baby voice to Gu Zhihan, “Husband, I want to marry you,” but he would grimace and respond, “Who would marry you!”When they grew up, Gu Zhihan hooked her chin, pinned her against the corner, and smirked, “Mengmeng, I heard getting married is cheap nowadays, I'll treat you.”From birth to kindergarten, elementary, middle school, high school, and university, they had always been together.[Growth literature, from childhood to adulthood, exclusively adored]