Mushoku Tensei - Volume 17 Side Story — Black Wolf Sword King

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.

He used to think Death was the end.He was wrong.Death was but another beginning, a new adventure.Reborn into this strange and familiar world, he should have been dead, his soul fading into nothingness, but he found himself in a completely new existence. Now, as a Primordial instead of a human, he must find his place in this wondrous world.

She is the 21st century best secret agent, died after a plane crash and transmigrated to a dysnasty not found in history. Not to mention being reincarnated as an infant, to suffer repeatedly by being framed by the Madame, bullied and humiliated by the Shu daughters, years of patience only for the sky to strike.

The number one landlord in the country? Jiang Hu’s hard to get a hold off and can barely catch a glimpse off ghost doctor? A patriarchal clan of saints who was supposed to be extinct a thousand years ago? Which one is really her?

He is the Tianfeng Dynasty’s most capable prince, and at the same time the most beloved son of the emperor. He is cold, he is ruthless, he is cruel, he is bloodthirsty, and he treated women as clothing. Everyone knows that he is heartless, but nobody knows that he has been in love before.

He was a man who has been silenced, her lover from a thousand years ago. A thousand years of entanglement, willing to give everything, just to exchange for that one beautiful woman’s smile.

“Who are you?’

” I’m your husband.”

“You think I’m three years old? My husband looks better than you.”

“I’m your husband 1,000 years ago.”

The woman, petrified, carefully asked, “How old are you this year?”

“2,220 years old.”

“Get the hell out! Bastard!! 2,220 years old!! Why don’t you say your dad was 12,000 years old?”

“My father is in fact this age, you still remember.”

“…”

- Description from Novelupdates

Qin Chen crossed into Taiyi Holy Land as a sweeper, and at the age of sixteen awakened the system. As long as he signed in at different places, he could get different rewards.

Sign in at the Land of Emperor Ruins and get the world’s No. 1 Chaos Holy Body and the Chaos Emperor Sutra!

Sign in to seal the magic land and get the quasi-emperor soldiers!

Sign in at the Refining Hall and get the God-level Refining Technique!

Sign in at the medicine garden and get the medicine of immortality!

Sign in at the Imperial Palace and get the Emperor-level forbidden magical power ‘Resurrection from the Dead’!

…

Qin Chen thought that he would just sign in silently until the world was invincible.

One day, the relics of the Great Emperor will appear in the Holy Land, all the holy places, families, and ancient dynasties have come, and there will be an unparalleled demon king in the relics, killing countless powerhouses, ruling the world, and wanting to destroy the Holy Land.

In desperation, Qin Chen could only walk out, slapped the Demon King to death, and sighed: “I just want to be a sweeper and sign in silently. Why do you force me to take action?”

- Description from novelbuddy