MTL - My Spy Years - Chapter 1008v3 When did the feud take place?

Of the ancient gods only one remained in the world. This god lived alone for thousands of years and no longer had any desires. Legend had it that during the great war between the worlds he used his powers to turn the tide managing to seal the cataclysmic rift bringing order back into the three realms. Time flew by and hundreds of years passed in the blink of an eye.

In this time Shen Li was born into the demon world. Known as the Azure Sky King she was used to living a bright and dazzling life full of successes. Little did she know that her 1000th birthday would bring misfortune to her doorstep – a politically arranged marriage with her name on it. The Azure Sky King would henceforth marry the thirty-third grandson of the Heavenly Emperor, Fu Rongjun. This arranged marriage was meant to unite the Heavenly realm with the Demonic Realm, bringing the two together. Most would consider it good fortune to be related to the Emperor.

Unfortunately Fu Rongjun was infamous throughout the two realms for his Casanova personality. As the King who called the shots in the Demonic Realm, she had the ability to quell uprisings and end wars with a swing of her silver spear – there was absolutely no way she would marry such a flirtatious idiot. She had to escape from this marriage somehow even if it meant death!

In her escape Shen Li, never expected to meet a man that didn’t belong to any of the three realms. This oddball was truly strange!

- Description from Novelupdates

An ordinary young man reincarnates as Adrian, the eldest son of a once-prominent noble family now living out in boonies of the kingdom. Watch as Adrian embarks on a tantalizing journey, to support his graceful and caring mother and feisty older sister, as a man should, with his seduction system.

Crossing over to Japan during the year 1860, a time marked by the end of the Edo Shogunate Era, amidst a whirlwind of events.Having completed the industrial revolution, foreign powers with steam battleships have opened Japan's doors, bringing turmoil and opportunity to the nation.In this chaotic era, Tachibana Aoto, who travels through time to become an ordinary police officer in Edo (modern Tokyo), acquires the Talent Duplication System, allowing him to duplicate any talent from an opponent after a confrontation, regardless of winning or losing.For instance—after a match with a beautiful youth named Chokata Toshisuke, Tachibana Aoto duplicates the talent of Swordsmanship Talent Amplification, increased by 50 times the average person's talent.