May The Rest Of My Life Be Sweet To You ( Machine Translation ) - Chapter 2 - Chapter two, you can keep her as you like

Floren, the most renowned realm of all realms, yet forgotten by all. The soul of a person from Earth accidentally crashed into this unexplored realm, ending up in a dragon egg. Transforming into a crimson dragon with the mindset of a human, Claudius was different from other dragons. He only wished to live an easy life, enjoying his lifespan of thousands of years to its fullest. However, the world is not such a forgiving place, dragging Claudius into countless struggles and death battles. Is it really possible to live a leisurely life?!

- Description from Novelupdates

Jiang Cheng transmigrated into an urban novel, but his identity is not the protagonist!His identity is the fiancé of the villainous female CEO?!A business genius whose family fell into decline became a son-in-law?[ Ding! System activated! The system of the destiny villain has been activated! ]Gain villain value just by changing the plot and plundering the protagonist’s opportunities?[ Ding! Congratulations on getting the skill ‘Thug in Suit’! ][ Ding! Congratulations on getting the first heroine to confess her love to you. Villain value +9999! ][ Ding! Congratulations on successfully robbing the protagonist of his opportunity! ]Steal the protagonist’s opportunities and connections!From then on, Jiang Cheng went further and further on his way to becoming a villain.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Every human has their Personal Jewel of power, when awakened it can either be an Elemental Jewel or Physical Jewel. They circle the right and left wrists like bracelets of power.