MTL - Comprehensive Manga: Starting From Teaching Hinata’s Black Coffin, It Will Be Returned 10,000 Times - Chapter 12

Aelock, proud of belonging to a prestigious noble family, falls in love at first sight in a chance encounter with Klopp, who belongs to a lower-ranking noble family. Aelock approaches him without paying any mind to the difference in wealth and status, even disregarding the taboo of alpha-alpha relationships. However, Klopp takes no notice of him and marries another omega.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

A century after the Spirit Qi Awakening, the world enters a new era. Humans are able to absorb the world’s awakened spirit qi, allowing them to tread on a new path—spirit qi occupations!