Naruto: Talent Analyst - Chapter 161: Awakening the Rinnegan?

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates

The story is about a a hitman, Who dies because of his own recklessness and transmigrates into a game he used to play after his retirement as a hitman.I'm not gonna spoil any further, but i might answer few of your questions.Is MC overpowered?Nope, he'll become strong over time and all battle he'll fight will be because of his effort and techniques.Is there magic and adventure?Yes! It have both magic like normal isekai with adventure and fighting with monsters and many other things. There are other important things like “Essence Stone” But let's talk about it in the chapters.There will be harem?Not really, He will be in contact with many beautiful female and males but one waifu but i haven't decided yet.All i can say is, give it a try, I'll try my best to make it worth your time.

A young Brave walked out of his village, gathered companions to his side, defeated the Great Demon King, became famous, then came back with beauties in hand! This was a legend that appears in the world of Seyrol every 200 years!

Our protagonist, however, isn’t a Brave. Even so, for over a thousand years his figure has loomed throughout its history.

Unwittingly, the name of the Red-robed Priest began to resound throughout the world. Red-robed Priest’s legend included extraordinary sword techniques and magic, erudite knowledge, and an almost prophetic ability to lead young Braves toward the proper path. People of the world think of him as a descendent of the ancient Yellow Race which led to his omnipotence. In essence, however, this was just the characteristics of the profession known as ‘Noble’.

- Description from Novelupdates

The day the city fell, Feng Yun was treated by her father as a spoil of war and presented to the enemy general.Everyone pitied her, soon to be a captive, plunging into a fiery pit.Yet she veiled the little donkey cart that took her out of the city tightly, daring not to let anyone see the secret delight in her heart…As a child, she behaved oddly and spoke startling words, once predicting a war in which the whole army was wiped out, nearly being burned to death by her clan as a demon.When she grew up, her beauty was out of the world, but she was rejected by her husband's family.In the period of chaos and disorder everywhewe, where could a female captive go?“I do not seek a devoted partner to grow old with; I merely wish to rule unrivaled in this life.”In her previous life, Feng Yun was always the one being scorned by others; in this life, she decided to strike first, turning the tables on each and every one of them, those so-called unreachable flowers and beasts in gentleman's clothing, those degenerates… all to be scorned in return.